253025991 has 16 divisors (see below), whose sum is σ = 375724800. Its totient is φ = 168291864.

The previous prime is 253025959. The next prime is 253026001. The reversal of 253025991 is 199520352.

It is a happy number.

It is not a de Polignac number, because 253025991 - 2⁵ = 253025959 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253025911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180 + ... + 22526.

It is an arithmetic number, because the mean of its divisors is an integer number (23482800).

Almost surely, 2^253025991 is an apocalyptic number.

253025991 is a deficient number, since it is larger than the sum of its proper divisors (122698809).

253025991 is a wasteful number, since it uses less digits than its factorization.

253025991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21795 (or 21789 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 253025991 is about 15906.7907196895. The cubic root of 253025991 is about 632.4920117516.

It can be divided in two parts, 253025 and 991, that added together give a square (254016 = 504²).

The spelling of 253025991 in words is "two hundred fifty-three million, twenty-five thousand, nine hundred ninety-one".