252278613 has 6 divisors (see below), whose sum is σ = 364402454. Its totient is φ = 168185736.

The previous prime is 252278603. The next prime is 252278629. The reversal of 252278613 is 316872252.

252278613 is a `hidden beast` number, since 2 + 522 + 78 + 61 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 249103089 + 3175524 = 15783^2 + 1782^2 .

It is not a de Polignac number, because 252278613 - 2¹⁰ = 252277589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252278603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14015470 + ... + 14015487.

Almost surely, 2^252278613 is an apocalyptic number.

It is an amenable number.

252278613 is a deficient number, since it is larger than the sum of its proper divisors (112123841).

252278613 is a wasteful number, since it uses less digits than its factorization.

252278613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030963 (or 28030960 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 252278613 is about 15883.2809268111. The cubic root of 252278613 is about 631.8686544400.

The spelling of 252278613 in words is "two hundred fifty-two million, two hundred seventy-eight thousand, six hundred thirteen".