61131253 has 4 divisors (see below), whose sum is σ = 61175520. Its totient is φ = 61086988.

The previous prime is 61131241. The next prime is 61131319. The reversal of 61131253 is 35213116.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 61131253 - 2²⁵ = 27576821 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 (61131223) 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, 19993 + ... + 22846.

It is an arithmetic number, because the mean of its divisors is an integer number (15293880).

Almost surely, 2^61131253 is an apocalyptic number.

It is an amenable number.

61131253 is a deficient number, since it is larger than the sum of its proper divisors (44267).

61131253 is a wasteful number, since it uses less digits than its factorization.

61131253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44266.

The product of its digits is 540, while the sum is 22.

The square root of 61131253 is about 7818.6477731127. The cubic root of 61131253 is about 393.9318532452.

Adding to 61131253 its reverse (35213116), we get a palindrome (96344369).

The spelling of 61131253 in words is "sixty-one million, one hundred thirty-one thousand, two hundred fifty-three".