25551151 has 4 divisors (see below), whose sum is σ = 25632072. Its totient is φ = 25470232.

The previous prime is 25551139. The next prime is 25551173. The reversal of 25551151 is 15115552.

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 25551151 - 2¹⁹ = 25026863 is a prime.

It is a super-2 number, since 2×25551151² = 1305722634849602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25551191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39985 + ... + 40618.

It is an arithmetic number, because the mean of its divisors is an integer number (6408018).

Almost surely, 2^25551151 is an apocalyptic number.

25551151 is a deficient number, since it is larger than the sum of its proper divisors (80921).

25551151 is an equidigital number, since it uses as much as digits as its factorization.

25551151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80920.

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

The square root of 25551151 is about 5054.8146355727. The cubic root of 25551151 is about 294.5349408898.

The spelling of 25551151 in words is "twenty-five million, five hundred fifty-one thousand, one hundred fifty-one".