30631572142 has 4 divisors (see below), whose sum is σ = 45947358216. Its totient is φ = 15315786070.

The previous prime is 30631572131. The next prime is 30631572187. The reversal of 30631572142 is 24127513603.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 30631572098 and 30631572107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7657893034 + ... + 7657893037.

It is an arithmetic number, because the mean of its divisors is an integer number (11486839554).

Almost surely, 2^30631572142 is an apocalyptic number.

30631572142 is a deficient number, since it is larger than the sum of its proper divisors (15315786074).

30631572142 is a wasteful number, since it uses less digits than its factorization.

30631572142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15315786073.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 30631572142 in words is "thirty billion, six hundred thirty-one million, five hundred seventy-two thousand, one hundred forty-two".