351221252456 has 16 divisors (see below), whose sum is σ = 669701541600. Its totient is φ = 172634174704.

The previous prime is 351221252383. The next prime is 351221252479. The reversal of 351221252456 is 654252122153.

It is a super-2 number, since 2×351221252456² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372055940 + ... + 372056883.

It is an arithmetic number, because the mean of its divisors is an integer number (41856346350).

Almost surely, 2^351221252456 is an apocalyptic number.

It is an amenable number.

351221252456 is a deficient number, since it is larger than the sum of its proper divisors (318480289144).

351221252456 is a wasteful number, since it uses less digits than its factorization.

351221252456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744112888 (or 744112884 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

The spelling of 351221252456 in words is "three hundred fifty-one billion, two hundred twenty-one million, two hundred fifty-two thousand, four hundred fifty-six".