25155511 has 2 divisors, whose sum is σ = 25155512. Its totient is φ = 25155510.

The previous prime is 25155479. The next prime is 25155517. The reversal of 25155511 is 11555152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25155511 - 2⁵ = 25155479 is a prime.

It is a super-2 number, since 2×25155511² = 1265599467342242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25155517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577755 + 12577756.

It is an arithmetic number, because the mean of its divisors is an integer number (12577756).

Almost surely, 2^25155511 is an apocalyptic number.

25155511 is a deficient number, since it is larger than the sum of its proper divisors (1).

25155511 is an equidigital number, since it uses as much as digits as its factorization.

25155511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1250, while the sum is 25.

The square root of 25155511 is about 5015.5269912543. The cubic root of 25155511 is about 293.0068102491.

The spelling of 25155511 in words is "twenty-five million, one hundred fifty-five thousand, five hundred eleven".