25671555 has 48 divisors (see below), whose sum is σ = 54774720. Its totient is φ = 10831104.

The previous prime is 25671553. The next prime is 25671593. The reversal of 25671555 is 55517652.

It is a happy number.

It is not a de Polignac number, because 25671555 - 2¹ = 25671553 is a prime.

It is a super-2 number, since 2×25671555² = 1318057472236050, which contains 22 as substring.

25671555 is a Rhonda number in base 14.

It is not an unprimeable number, because it can be changed into a prime (25671551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 961 + ... + 7229.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^25671555 is an apocalyptic number.

25671555 is an abundant number, since it is smaller than the sum of its proper divisors (29103165).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25671555 is a wasteful number, since it uses less digits than its factorization.

25671555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6300 (or 6297 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 25671555 is about 5066.7104713019. The cubic root of 25671555 is about 294.9968591067.

The spelling of 25671555 in words is "twenty-five million, six hundred seventy-one thousand, five hundred fifty-five".