55131253 has 4 divisors (see below), whose sum is σ = 57528288. Its totient is φ = 52734220.

The previous prime is 55131247. The next prime is 55131257. The reversal of 55131253 is 35213155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35213155 = 5 ⋅7042631.

It is a cyclic number.

It is not a de Polignac number, because 55131253 - 2¹⁷ = 55000181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55131257) 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, 1198483 + ... + 1198528.

It is an arithmetic number, because the mean of its divisors is an integer number (14382072).

Almost surely, 2^55131253 is an apocalyptic number.

It is an amenable number.

55131253 is a deficient number, since it is larger than the sum of its proper divisors (2397035).

55131253 is a wasteful number, since it uses less digits than its factorization.

55131253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397034.

The product of its digits is 2250, while the sum is 25.

The square root of 55131253 is about 7425.0422894419. The cubic root of 55131253 is about 380.5975202492.

The spelling of 55131253 in words is "fifty-five million, one hundred thirty-one thousand, two hundred fifty-three".