351021402 has 12 divisors (see below), whose sum is σ = 760546410. Its totient is φ = 117007128.

The previous prime is 351021397. The next prime is 351021403. The reversal of 351021402 is 204120153.

It can be written as a sum of positive squares in only one way, i.e., 241211961 + 109809441 = 15531^2 + 10479^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 19501189 = 351021402 / (3 + 5 + 1 + 0 + 2 + 1 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (351021403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9750577 + ... + 9750612.

Almost surely, 2^351021402 is an apocalyptic number.

351021402 is an abundant number, since it is smaller than the sum of its proper divisors (409525008).

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

351021402 is a wasteful number, since it uses less digits than its factorization.

351021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19501197 (or 19501194 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 351021402 is about 18735.5651636133. The cubic root of 351021402 is about 705.4147431374.

Adding to 351021402 its reverse (204120153), we get a palindrome (555141555).

The spelling of 351021402 in words is "three hundred fifty-one million, twenty-one thousand, four hundred two".