31621142146 has 16 divisors (see below), whose sum is σ = 51949846368. Its totient is φ = 14315980000.

The previous prime is 31621142143. The next prime is 31621142149. The reversal of 31621142146 is 64124112613.

It is an interprime number because it is at equal distance from previous prime (31621142143) and next prime (31621142149).

It is not an unprimeable number, because it can be changed into a prime (31621142143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2857675 + ... + 2868718.

It is an arithmetic number, because the mean of its divisors is an integer number (3246865398).

Almost surely, 2^31621142146 is an apocalyptic number.

31621142146 is a deficient number, since it is larger than the sum of its proper divisors (20328704222).

31621142146 is a wasteful number, since it uses less digits than its factorization.

31621142146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726657.

The product of its digits is 6912, while the sum is 31.

Adding to 31621142146 its reverse (64124112613), we get a palindrome (95745254759).

The spelling of 31621142146 in words is "thirty-one billion, six hundred twenty-one million, one hundred forty-two thousand, one hundred forty-six".