971520520031 has 8 divisors (see below), whose sum is σ = 1022730284400. Its totient is φ = 920318466240.

The previous prime is 971520520013. The next prime is 971520520037. The reversal of 971520520031 is 130025025179.

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 971520520031 - 2³⁴ = 954340650847 is a prime.

It is a super-2 number, since 2×971520520031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 971520519973 and 971520520000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971520520037) 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, 1668110 + ... + 2173851.

It is an arithmetic number, because the mean of its divisors is an integer number (127841285550).

Almost surely, 2^971520520031 is an apocalyptic number.

971520520031 is a deficient number, since it is larger than the sum of its proper divisors (51209764369).

971520520031 is a wasteful number, since it uses less digits than its factorization.

971520520031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855289.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 971520520031 in words is "nine hundred seventy-one billion, five hundred twenty million, five hundred twenty thousand, thirty-one".