25520051 has 2 divisors, whose sum is σ = 25520052. Its totient is φ = 25520050.

The previous prime is 25520017. The next prime is 25520063. The reversal of 25520051 is 15002552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25520051 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25520071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760025 + 12760026.

It is an arithmetic number, because the mean of its divisors is an integer number (12760026).

Almost surely, 2^25520051 is an apocalyptic number.

25520051 is a deficient number, since it is larger than the sum of its proper divisors (1).

25520051 is an equidigital number, since it uses as much as digits as its factorization.

25520051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 25520051 is about 5051.7374238969. The cubic root of 25520051 is about 294.4153930384.

The spelling of 25520051 in words is "twenty-five million, five hundred twenty thousand, fifty-one".