251346216832 has 32 divisors (see below), whose sum is σ = 522499614480. Its totient is φ = 120209058816.

The previous prime is 251346216791. The next prime is 251346216833. The reversal of 251346216832 is 238612643152.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251346216833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42684933 + ... + 42690820.

Almost surely, 2^251346216832 is an apocalyptic number.

It is an amenable number.

251346216832 is an abundant number, since it is smaller than the sum of its proper divisors (271153397648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251346216832 is an equidigital number, since it uses as much as digits as its factorization.

251346216832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85375790 (or 85375778 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

Adding to 251346216832 its reverse (238612643152), we get a palindrome (489958859984).

The spelling of 251346216832 in words is "two hundred fifty-one billion, three hundred forty-six million, two hundred sixteen thousand, eight hundred thirty-two".