Search a number
-
+
30715401 = 310238467
BaseRepresentation
bin111010100101…
…0111000001001
32010210111121110
41311022320021
530330343101
63014200533
7522035163
oct165127011
963714543
1030715401
1116379a32
12a353149
1364957c2
144117933
152a6acd6
hex1d4ae09

30715401 has 4 divisors (see below), whose sum is σ = 40953872. Its totient is φ = 20476932.

The previous prime is 30715387. The next prime is 30715403. The reversal of 30715401 is 10451703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10451703 = 33483901.

It is not a de Polignac number, because 30715401 - 26 = 30715337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30715403) 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, 5119231 + ... + 5119236.

It is an arithmetic number, because the mean of its divisors is an integer number (10238468).

Almost surely, 230715401 is an apocalyptic number.

It is an amenable number.

30715401 is a deficient number, since it is larger than the sum of its proper divisors (10238471).

30715401 is a wasteful number, since it uses less digits than its factorization.

30715401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10238470.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 30715401 is about 5542.1476883966. The cubic root of 30715401 is about 313.1737816279.

The spelling of 30715401 in words is "thirty million, seven hundred fifteen thousand, four hundred one".

Divisors: 1 3 10238467 30715401