2051775631 has 2 divisors, whose sum is σ = 2051775632. Its totient is φ = 2051775630.

The previous prime is 2051775623. The next prime is 2051775683. The reversal of 2051775631 is 1365771502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2051775631 - 2³ = 2051775623 is a prime.

It is a super-2 number, since 2×2051775631² = 8419566479930896322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051775601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025887815 + 1025887816.

It is an arithmetic number, because the mean of its divisors is an integer number (1025887816).

Almost surely, 2^2051775631 is an apocalyptic number.

2051775631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051775631 is an equidigital number, since it uses as much as digits as its factorization.

2051775631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 2051775631 is about 45296.5300105869. The cubic root of 2051775631 is about 1270.7007584079.

The spelling of 2051775631 in words is "two billion, fifty-one million, seven hundred seventy-five thousand, six hundred thirty-one".