251320222532 has 12 divisors (see below), whose sum is σ = 439813899756. Its totient is φ = 125659108320.

The previous prime is 251320222529. The next prime is 251320222627. The reversal of 251320222532 is 235222023152.

It can be written as a sum of positive squares in 2 ways, for example, as 172911262276 + 78408960256 = 415826^2 + 280016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 251320222495 and 251320222504.

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 3 ways as a sum of consecutive naturals, for example, 849482 + ... + 1106462.

It is an arithmetic number, because the mean of its divisors is an integer number (36651158313).

Almost surely, 2^251320222532 is an apocalyptic number.

It is an amenable number.

251320222532 is a deficient number, since it is larger than the sum of its proper divisors (188493677224).

251320222532 is a wasteful number, since it uses less digits than its factorization.

251320222532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501478 (or 501476 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 251320222532 its reverse (235222023152), we get a palindrome (486542245684).

The spelling of 251320222532 in words is "two hundred fifty-one billion, three hundred twenty million, two hundred twenty-two thousand, five hundred thirty-two".