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30064261 = 247312157
BaseRepresentation
bin111001010101…
…1111010000101
32002120102102011
41302223322011
530144024021
62552214221
7513353623
oct162537205
962512364
1030064261
1115a747a7
12a09a371
1362c8306
143dc8513
15298cde1
hex1cabe85

30064261 has 4 divisors (see below), whose sum is σ = 30078892. Its totient is φ = 30049632.

The previous prime is 30064259. The next prime is 30064283. The reversal of 30064261 is 16246003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16246003 = 29560207.

It can be written as a sum of positive squares in 2 ways, for example, as 10439361 + 19624900 = 3231^2 + 4430^2 .

It is a cyclic number.

It is not a de Polignac number, because 30064261 - 21 = 30064259 is a prime.

It is a super-2 number, since 2×300642612 = 1807719578952242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30064201) 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, 3606 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (7519723).

Almost surely, 230064261 is an apocalyptic number.

It is an amenable number.

30064261 is a deficient number, since it is larger than the sum of its proper divisors (14631).

30064261 is a wasteful number, since it uses less digits than its factorization.

30064261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14630.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 30064261 is about 5483.0886368907. The cubic root of 30064261 is about 310.9449522266.

The spelling of 30064261 in words is "thirty million, sixty-four thousand, two hundred sixty-one".

Divisors: 1 2473 12157 30064261