2516561031 has 32 divisors (see below), whose sum is σ = 3605391360. Its totient is φ = 1557287424.

The previous prime is 2516561029. The next prime is 2516561053. The reversal of 2516561031 is 1301656152.

It is not a de Polignac number, because 2516561031 - 2¹ = 2516561029 is a prime.

It is a super-2 number, since 2×2516561031² = 12666158845495565922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2516561031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516561011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1180975 + ... + 1183103.

It is an arithmetic number, because the mean of its divisors is an integer number (112668480).

Almost surely, 2^2516561031 is an apocalyptic number.

2516561031 is a deficient number, since it is larger than the sum of its proper divisors (1088830329).

2516561031 is a wasteful number, since it uses less digits than its factorization.

2516561031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 2516561031 is about 50165.3369469398. The cubic root of 2516561031 is about 1360.1991185891.

The spelling of 2516561031 in words is "two billion, five hundred sixteen million, five hundred sixty-one thousand, thirty-one".