61574131 has 4 divisors (see below), whose sum is σ = 62316072. Its totient is φ = 60832192.

The previous prime is 61574099. The next prime is 61574167. The reversal of 61574131 is 13147516.

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 61574131 - 2⁵ = 61574099 is a prime.

It is a super-2 number, since 2×61574131² = 7582747216810322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61574131.

It is not an unprimeable number, because it can be changed into a prime (61574831) 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 3 ways as a sum of consecutive naturals, for example, 370846 + ... + 371011.

It is an arithmetic number, because the mean of its divisors is an integer number (15579018).

Almost surely, 2^61574131 is an apocalyptic number.

61574131 is a deficient number, since it is larger than the sum of its proper divisors (741941).

61574131 is an equidigital number, since it uses as much as digits as its factorization.

61574131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741940.

The product of its digits is 2520, while the sum is 28.

The square root of 61574131 is about 7846.9185671829. The cubic root of 61574131 is about 394.8808720500.

The spelling of 61574131 in words is "sixty-one million, five hundred seventy-four thousand, one hundred thirty-one".