Search a number
-
+
30235801 = 40175401
BaseRepresentation
bin111001101010…
…1110010011001
32002220010201111
41303111302121
530220021201
63000020321
7515000011
oct163256231
962803644
1030235801
1116081672
12a1616a1
13635840b
144030c41
1529c3b51
hex1cd5c99

30235801 has 4 divisors (see below), whose sum is σ = 30311604. Its totient is φ = 30160000.

The previous prime is 30235781. The next prime is 30235813. The reversal of 30235801 is 10853203.

30235801 = 492 + 502 + ... + 4492.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22810176 + 7425625 = 4776^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 30235801 - 25 = 30235769 is a prime.

It is a super-2 number, since 2×302358012 = 1828407324223202, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30235841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37300 + ... + 38101.

It is an arithmetic number, because the mean of its divisors is an integer number (7577901).

Almost surely, 230235801 is an apocalyptic number.

It is an amenable number.

30235801 is a deficient number, since it is larger than the sum of its proper divisors (75803).

30235801 is an equidigital number, since it uses as much as digits as its factorization.

30235801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75802.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30235801 is about 5498.7090303088. The cubic root of 30235801 is about 311.5352252830.

The spelling of 30235801 in words is "thirty million, two hundred thirty-five thousand, eight hundred one".

Divisors: 1 401 75401 30235801