351003681 has 12 divisors (see below), whose sum is σ = 579434752. Its totient is φ = 200573496.

The previous prime is 351003677. The next prime is 351003689. The reversal of 351003681 is 186300153.

It is not a de Polignac number, because 351003681 - 2² = 351003677 is a prime.

It is a super-2 number, since 2×351003681² = 246407168151099522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351003689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2785681 + ... + 2785806.

Almost surely, 2^351003681 is an apocalyptic number.

It is an amenable number.

351003681 is a deficient number, since it is larger than the sum of its proper divisors (228431071).

351003681 is a wasteful number, since it uses less digits than its factorization.

351003681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571500 (or 5571497 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 351003681 is about 18735.0922335600. The cubic root of 351003681 is about 705.4028721945.

It can be divided in two parts, 35100 and 3681, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 351003681 in words is "three hundred fifty-one million, three thousand, six hundred eighty-one".