2512057891 has 4 divisors (see below), whose sum is σ = 2870923312. Its totient is φ = 2153192472.

The previous prime is 2512057883. The next prime is 2512057931. The reversal of 2512057891 is 1987502152.

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 2512057891 - 2³ = 2512057883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2512057871) 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, 179432700 + ... + 179432713.

It is an arithmetic number, because the mean of its divisors is an integer number (717730828).

Almost surely, 2^2512057891 is an apocalyptic number.

2512057891 is a deficient number, since it is larger than the sum of its proper divisors (358865421).

2512057891 is an equidigital number, since it uses as much as digits as its factorization.

2512057891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358865420.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 2512057891 is about 50120.4338668372. The cubic root of 2512057891 is about 1359.3873197252.

The spelling of 2512057891 in words is "two billion, five hundred twelve million, fifty-seven thousand, eight hundred ninety-one".