251132451533436 has 48 divisors (see below), whose sum is σ = 641676834425088. Its totient is φ = 75811386441600.

The previous prime is 251132451533387. The next prime is 251132451533437. The reversal of 251132451533436 is 634335154231152.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251132451533437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3616920745 + ... + 3616990176.

It is an arithmetic number, because the mean of its divisors is an integer number (13368267383856).

Almost surely, 2^{251132451533436} is an apocalyptic number.

It is an amenable number.

251132451533436 is an abundant number, since it is smaller than the sum of its proper divisors (390544382891652).

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

251132451533436 is a wasteful number, since it uses less digits than its factorization.

251132451533436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7233911202 (or 7233911200 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 48.

The spelling of 251132451533436 in words is "two hundred fifty-one trillion, one hundred thirty-two billion, four hundred fifty-one million, five hundred thirty-three thousand, four hundred thirty-six".