391022223331402 has 96 divisors (see below), whose sum is σ = 663114095195904. Its totient is φ = 172680806188800.

The previous prime is 391022223331357. The next prime is 391022223331409. The reversal of 391022223331402 is 204133322220193.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (391022223331409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3990503053 + ... + 3990601039.

It is an arithmetic number, because the mean of its divisors is an integer number (6907438491624).

Almost surely, 2^{391022223331402} is an apocalyptic number.

391022223331402 is a deficient number, since it is larger than the sum of its proper divisors (272091871864502).

391022223331402 is a wasteful number, since it uses less digits than its factorization.

391022223331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103344 (or 103331 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 37.

Adding to 391022223331402 its reverse (204133322220193), we get a palindrome (595155545551595).

The spelling of 391022223331402 in words is "three hundred ninety-one trillion, twenty-two billion, two hundred twenty-three million, three hundred thirty-one thousand, four hundred two".