25051919 has 2 divisors, whose sum is σ = 25051920. Its totient is φ = 25051918.

The previous prime is 25051909. The next prime is 25051981. The reversal of 25051919 is 91915052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25051919 - 2¹⁶ = 24986383 is a prime.

It is a super-2 number, since 2×25051919² = 1255197291165122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25051909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12525959 + 12525960.

It is an arithmetic number, because the mean of its divisors is an integer number (12525960).

Almost surely, 2^25051919 is an apocalyptic number.

25051919 is a deficient number, since it is larger than the sum of its proper divisors (1).

25051919 is an equidigital number, since it uses as much as digits as its factorization.

25051919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 25051919 is about 5005.1892072129. The cubic root of 25051919 is about 292.6040499621.

The spelling of 25051919 in words is "twenty-five million, fifty-one thousand, nine hundred nineteen".