311431030400402 has 8 divisors (see below), whose sum is σ = 509614413382512. Its totient is φ = 141559559272900.

The previous prime is 311431030400393. The next prime is 311431030400443. The reversal of 311431030400402 is 204004030134113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×311431030400402² (a number of 30 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, 7077977963624 + ... + 7077977963667.

It is an arithmetic number, because the mean of its divisors is an integer number (63701801672814).

Almost surely, 2^{311431030400402} is an apocalyptic number.

311431030400402 is a deficient number, since it is larger than the sum of its proper divisors (198183382982110).

311431030400402 is a wasteful number, since it uses less digits than its factorization.

311431030400402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155955927304.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 311431030400402 its reverse (204004030134113), we get a palindrome (515435060534515).

The spelling of 311431030400402 in words is "three hundred eleven trillion, four hundred thirty-one billion, thirty million, four hundred thousand, four hundred two".