25361551 has 8 divisors (see below), whose sum is σ = 25634384. Its totient is φ = 25090560.

The previous prime is 25361537. The next prime is 25361579. The reversal of 25361551 is 15516352.

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

It is a cyclic number.

It is not a de Polignac number, because 25361551 - 2⁷ = 25361423 is a prime.

It is a super-4 number, since 4×25361551⁴ (a number of 31 digits) contains 4444 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 (25361251) 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, 63685 + ... + 64081.

It is an arithmetic number, because the mean of its divisors is an integer number (3204298).

Almost surely, 2^25361551 is an apocalyptic number.

25361551 is a deficient number, since it is larger than the sum of its proper divisors (272833).

25361551 is a wasteful number, since it uses less digits than its factorization.

25361551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921.

The product of its digits is 4500, while the sum is 28.

The square root of 25361551 is about 5036.0253176488. The cubic root of 25361551 is about 293.8046081667.

The spelling of 25361551 in words is "twenty-five million, three hundred sixty-one thousand, five hundred fifty-one".