252640775 has 6 divisors (see below), whose sum is σ = 313274592. Its totient is φ = 202112600.

The previous prime is 252640747. The next prime is 252640783. The reversal of 252640775 is 577046252.

It is a happy number.

It is not a de Polignac number, because 252640775 - 2¹⁸ = 252378631 is a prime.

It is a super-2 number, since 2×252640775² = 127654722385201250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5052791 + ... + 5052840.

It is an arithmetic number, because the mean of its divisors is an integer number (52212432).

Almost surely, 2^252640775 is an apocalyptic number.

252640775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

252640775 is a deficient number, since it is larger than the sum of its proper divisors (60633817).

252640775 is a wasteful number, since it uses less digits than its factorization.

252640775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105641 (or 10105636 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 252640775 is about 15894.6775682931. The cubic root of 252640775 is about 632.1708724203.

The spelling of 252640775 in words is "two hundred fifty-two million, six hundred forty thousand, seven hundred seventy-five".