60731531521 has 16 divisors (see below), whose sum is σ = 61365470400. Its totient is φ = 60101702848.

The previous prime is 60731531507. The next prime is 60731531591. The reversal of 60731531521 is 12513513706.

It is a cyclic number.

It is not a de Polignac number, because 60731531521 - 2¹¹ = 60731529473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60731531591) 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, 47557335 + ... + 47558611.

It is an arithmetic number, because the mean of its divisors is an integer number (3835341900).

Almost surely, 2^60731531521 is an apocalyptic number.

It is an amenable number.

60731531521 is a deficient number, since it is larger than the sum of its proper divisors (633938879).

60731531521 is a wasteful number, since it uses less digits than its factorization.

60731531521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528.

The product of its (nonzero) digits is 18900, while the sum is 34.

It can be divided in two parts, 607315 and 31521, that added together give a palindrome (638836).

The spelling of 60731531521 in words is "sixty billion, seven hundred thirty-one million, five hundred thirty-one thousand, five hundred twenty-one".