31420313022402 has 40 divisors (see below), whose sum is σ = 72832526365500. Its totient is φ = 10112284649376.

The previous prime is 31420313022367. The next prime is 31420313022409. The reversal of 31420313022402 is 20422031302413.

31420313022402 is a `hidden beast` number, since 3 + 1 + 4 + 203 + 1 + 30 + 22 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27211861817001 + 4208451205401 = 5216499^2 + 2051451^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31420313022409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3344004777 + ... + 3344014172.

Almost surely, 2^{31420313022402} is an apocalyptic number.

31420313022402 is an abundant number, since it is smaller than the sum of its proper divisors (41412213343098).

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

31420313022402 is a wasteful number, since it uses less digits than its factorization.

31420313022402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688018992 (or 6688018983 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 31420313022402 its reverse (20422031302413), we get a palindrome (51842344324815).

The spelling of 31420313022402 in words is "thirty-one trillion, four hundred twenty billion, three hundred thirteen million, twenty-two thousand, four hundred two".