30131729516 has 48 divisors (see below), whose sum is σ = 63209158656. Its totient is φ = 12297230784.

The previous prime is 30131729513. The next prime is 30131729533. The reversal of 30131729516 is 61592713103.

It is a super-2 number, since 2×30131729516² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30131729516.

It is not an unprimeable number, because it can be changed into a prime (30131729513) 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, 260720 + ... + 358103.

It is an arithmetic number, because the mean of its divisors is an integer number (1316857472).

Almost surely, 2^30131729516 is an apocalyptic number.

It is an amenable number.

30131729516 is an abundant number, since it is smaller than the sum of its proper divisors (33077429140).

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

30131729516 is a wasteful number, since it uses less digits than its factorization.

30131729516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618918 (or 618916 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The spelling of 30131729516 in words is "thirty billion, one hundred thirty-one million, seven hundred twenty-nine thousand, five hundred sixteen".