253621131 has 4 divisors (see below), whose sum is σ = 338161512. Its totient is φ = 169080752.

The previous prime is 253621129. The next prime is 253621133. The reversal of 253621131 is 131126352.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (253621129) and next prime (253621133).

It is a cyclic number.

It is not a de Polignac number, because 253621131 - 2¹ = 253621129 is a prime.

It is a super-2 number, since 2×253621131² = 128647356179438322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253621133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42270186 + ... + 42270191.

It is an arithmetic number, because the mean of its divisors is an integer number (84540378).

Almost surely, 2^253621131 is an apocalyptic number.

253621131 is a deficient number, since it is larger than the sum of its proper divisors (84540381).

253621131 is an equidigital number, since it uses as much as digits as its factorization.

253621131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84540380.

The product of its digits is 1080, while the sum is 24.

The square root of 253621131 is about 15925.4868371425. The cubic root of 253621131 is about 632.9875162566.

Adding to 253621131 its reverse (131126352), we get a palindrome (384747483).

The spelling of 253621131 in words is "two hundred fifty-three million, six hundred twenty-one thousand, one hundred thirty-one".