31214245402 has 32 divisors (see below), whose sum is σ = 48533760000. Its totient is φ = 15040695600.

The previous prime is 31214245379. The next prime is 31214245409. The reversal of 31214245402 is 20454241213.

It is not an unprimeable number, because it can be changed into a prime (31214245409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20387377 + ... + 20388907.

It is an arithmetic number, because the mean of its divisors is an integer number (1516680000).

Almost surely, 2^31214245402 is an apocalyptic number.

31214245402 is a deficient number, since it is larger than the sum of its proper divisors (17319514598).

31214245402 is a wasteful number, since it uses less digits than its factorization.

31214245402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 31214245402 its reverse (20454241213), we get a palindrome (51668486615).

The spelling of 31214245402 in words is "thirty-one billion, two hundred fourteen million, two hundred forty-five thousand, four hundred two".