251420244052 has 24 divisors (see below), whose sum is σ = 461950745760. Its totient is φ = 119563715040.

The previous prime is 251420244041. The next prime is 251420244067. The reversal of 251420244052 is 250442024152.

It is a super-3 number, since 3×251420244052³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16166974 + ... + 16182517.

It is an arithmetic number, because the mean of its divisors is an integer number (19247947740).

Almost surely, 2^251420244052 is an apocalyptic number.

It is an amenable number.

251420244052 is a deficient number, since it is larger than the sum of its proper divisors (210530501708).

251420244052 is a wasteful number, since it uses less digits than its factorization.

251420244052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32349591 (or 32349589 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

The spelling of 251420244052 in words is "two hundred fifty-one billion, four hundred twenty million, two hundred forty-four thousand, fifty-two".