251533002052 has 6 divisors (see below), whose sum is σ = 440182753598. Its totient is φ = 125766501024.

The previous prime is 251533002001. The next prime is 251533002053. The reversal of 251533002052 is 250200335152.

It can be written as a sum of positive squares in only one way, i.e., 183487149316 + 68045852736 = 428354^2 + 260856^2 .

It is a super-2 number, since 2×251533002052² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251533002052.

It is not an unprimeable number, because it can be changed into a prime (251533002053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31441625253 + ... + 31441625260.

Almost surely, 2^251533002052 is an apocalyptic number.

It is an amenable number.

251533002052 is a deficient number, since it is larger than the sum of its proper divisors (188649751546).

251533002052 is a wasteful number, since it uses less digits than its factorization.

251533002052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62883250517 (or 62883250515 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 251533002052 in words is "two hundred fifty-one billion, five hundred thirty-three million, two thousand, fifty-two".