25428551 has 8 divisors (see below), whose sum is σ = 26148864. Its totient is φ = 24715800.

The previous prime is 25428539. The next prime is 25428553. The reversal of 25428551 is 15582452.

25428551 = T₂₅₀ + T₂₅₁ + ... + T₅₅₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25428551 is a prime.

It is a super-2 number, since 2×25428551² = 1293222411919202, 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 (25428553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5306 + ... + 8888.

It is an arithmetic number, because the mean of its divisors is an integer number (3268608).

Almost surely, 2^25428551 is an apocalyptic number.

25428551 is a deficient number, since it is larger than the sum of its proper divisors (720313).

25428551 is a wasteful number, since it uses less digits than its factorization.

25428551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781.

The product of its digits is 16000, while the sum is 32.

The square root of 25428551 is about 5042.6730014943. The cubic root of 25428551 is about 294.0631044452.

The spelling of 25428551 in words is "twenty-five million, four hundred twenty-eight thousand, five hundred fifty-one".