2520531661931 has 4 divisors (see below), whose sum is σ = 2520542038032. Its totient is φ = 2520521285832.

The previous prime is 2520531661867. The next prime is 2520531662003. The reversal of 2520531661931 is 1391661350252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2520531661931 - 2⁶ = 2520531661867 is a prime.

It is a super-2 number, since 2×2520531661931² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520531631931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4814720 + ... + 5312493.

It is an arithmetic number, because the mean of its divisors is an integer number (630135509508).

Almost surely, 2^{2520531661931} is an apocalyptic number.

2520531661931 is a deficient number, since it is larger than the sum of its proper divisors (10376101).

2520531661931 is a wasteful number, since it uses less digits than its factorization.

2520531661931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10376100.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 2520531661931 in words is "two trillion, five hundred twenty billion, five hundred thirty-one million, six hundred sixty-one thousand, nine hundred thirty-one".