61253131 has 4 divisors (see below), whose sum is σ = 64477000. Its totient is φ = 58029264.

The previous prime is 61253099. The next prime is 61253147. The reversal of 61253131 is 13135216.

It is a happy number.

61253131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61253131 - 2⁵ = 61253099 is a prime.

It is a super-2 number, since 2×61253131² = 7503892114606322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61251131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611906 + ... + 1611943.

It is an arithmetic number, because the mean of its divisors is an integer number (16119250).

Almost surely, 2^61253131 is an apocalyptic number.

61253131 is a deficient number, since it is larger than the sum of its proper divisors (3223869).

61253131 is a wasteful number, since it uses less digits than its factorization.

61253131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223868.

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

The square root of 61253131 is about 7826.4379509455. The cubic root of 61253131 is about 394.1934747687.

Adding to 61253131 its reverse (13135216), we get a palindrome (74388347).

The spelling of 61253131 in words is "sixty-one million, two hundred fifty-three thousand, one hundred thirty-one".