251132271693 has 16 divisors (see below), whose sum is σ = 335586337920. Its totient is φ = 167050263744.

The previous prime is 251132271667. The next prime is 251132271757. The reversal of 251132271693 is 396172231152.

It is not a de Polignac number, because 251132271693 - 2¹² = 251132267597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251132271653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2485128 + ... + 2584206.

It is an arithmetic number, because the mean of its divisors is an integer number (20974146120).

Almost surely, 2^251132271693 is an apocalyptic number.

It is an amenable number.

251132271693 is a deficient number, since it is larger than the sum of its proper divisors (84454066227).

251132271693 is a wasteful number, since it uses less digits than its factorization.

251132271693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100948.

The product of its digits is 136080, while the sum is 42.

The spelling of 251132271693 in words is "two hundred fifty-one billion, one hundred thirty-two million, two hundred seventy-one thousand, six hundred ninety-three".