31529730139 has 16 divisors (see below), whose sum is σ = 34320384000. Its totient is φ = 28855604160.

The previous prime is 31529730137. The next prime is 31529730151. The reversal of 31529730139 is 93103792513.

It is a cyclic number.

It is not a de Polignac number, because 31529730139 - 2¹ = 31529730137 is a prime.

It is a super-3 number, since 3×31529730139³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31529730095 and 31529730104.

It is not an unprimeable number, because it can be changed into a prime (31529730131) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 288102 + ... + 382180.

It is an arithmetic number, because the mean of its divisors is an integer number (2145024000).

Almost surely, 2^31529730139 is an apocalyptic number.

31529730139 is a deficient number, since it is larger than the sum of its proper divisors (2790653861).

31529730139 is a wasteful number, since it uses less digits than its factorization.

31529730139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94698.

The product of its (nonzero) digits is 153090, while the sum is 43.

The spelling of 31529730139 in words is "thirty-one billion, five hundred twenty-nine million, seven hundred thirty thousand, one hundred thirty-nine".