973215545531 has 8 divisors (see below), whose sum is σ = 974620628640. Its totient is φ = 971811478528.

The previous prime is 973215545501. The next prime is 973215545557. The reversal of 973215545531 is 135545512379.

973215545531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 973215545531 - 2¹⁰ = 973215544507 is a prime.

It is a super-2 number, since 2×973215545531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 973215545531.

It is not an unprimeable number, because it can be changed into a prime (973215545501) 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, 1673465 + ... + 2178741.

It is an arithmetic number, because the mean of its divisors is an integer number (121827578580).

Almost surely, 2^973215545531 is an apocalyptic number.

973215545531 is a deficient number, since it is larger than the sum of its proper divisors (1405083109).

973215545531 is a wasteful number, since it uses less digits than its factorization.

973215545531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508053.

The product of its digits is 2835000, while the sum is 50.

The spelling of 973215545531 in words is "nine hundred seventy-three billion, two hundred fifteen million, five hundred forty-five thousand, five hundred thirty-one".