313121402 has 64 divisors (see below), whose sum is σ = 573868800. Its totient is φ = 126382080.

The previous prime is 313121327. The next prime is 313121407. The reversal of 313121402 is 204121313.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (313121407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765374 + ... + 765782.

It is an arithmetic number, because the mean of its divisors is an integer number (8966700).

Almost surely, 2^313121402 is an apocalyptic number.

313121402 is a deficient number, since it is larger than the sum of its proper divisors (260747398).

313121402 is a wasteful number, since it uses less digits than its factorization.

313121402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 313121402 is about 17695.2367037008. The cubic root of 313121402 is about 679.0539048811.

Adding to 313121402 its reverse (204121313), we get a palindrome (517242715).

The spelling of 313121402 in words is "three hundred thirteen million, one hundred twenty-one thousand, four hundred two".