252011537 has 8 divisors (see below), whose sum is σ = 261036840. Its totient is φ = 243297936.

The previous prime is 252011527. The next prime is 252011567. The reversal of 252011537 is 735110252.

It can be written as a sum of positive squares in 4 ways, for example, as 6431296 + 245580241 = 2536^2 + 15671^2 .

It is a de Polignac number, because none of the positive numbers 2^k-252011537 is a prime.

It is a super-2 number, since 2×252011537² = 127019629562204738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252011527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19223 + ... + 29555.

It is an arithmetic number, because the mean of its divisors is an integer number (32629605).

Almost surely, 2^252011537 is an apocalyptic number.

It is an amenable number.

252011537 is a deficient number, since it is larger than the sum of its proper divisors (9025303).

252011537 is an frugal number, since it uses more digits than its factorization.

252011537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10420 (or 10362 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 252011537 is about 15874.8712435723. The cubic root of 252011537 is about 631.6455987509.

Adding to 252011537 its reverse (735110252), we get a palindrome (987121789).

The spelling of 252011537 in words is "two hundred fifty-two million, eleven thousand, five hundred thirty-seven".