61010510531 has 4 divisors (see below), whose sum is σ = 61320208752. Its totient is φ = 60700812312.

The previous prime is 61010510507. The next prime is 61010510549. The reversal of 61010510531 is 13501501016.

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 61010510531 - 2²⁶ = 60943401667 is a prime.

It is a super-2 number, since 2×61010510531² (a number of 22 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 = 61010510497 and 61010510506.

It is not an unprimeable number, because it can be changed into a prime (61010510501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154848815 + ... + 154849208.

It is an arithmetic number, because the mean of its divisors is an integer number (15330052188).

Almost surely, 2^61010510531 is an apocalyptic number.

61010510531 is a deficient number, since it is larger than the sum of its proper divisors (309698221).

61010510531 is a wasteful number, since it uses less digits than its factorization.

61010510531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309698220.

The product of its (nonzero) digits is 450, while the sum is 23.

The spelling of 61010510531 in words is "sixty-one billion, ten million, five hundred ten thousand, five hundred thirty-one".