61732131 has 4 divisors (see below), whose sum is σ = 82309512. Its totient is φ = 41154752.

The previous prime is 61732127. The next prime is 61732141. The reversal of 61732131 is 13123716.

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 61732131 - 2² = 61732127 is a prime.

It is a super-2 number, since 2×61732131² = 7621711995602322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61732141) 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, 10288686 + ... + 10288691.

It is an arithmetic number, because the mean of its divisors is an integer number (20577378).

Almost surely, 2^61732131 is an apocalyptic number.

61732131 is a deficient number, since it is larger than the sum of its proper divisors (20577381).

61732131 is a wasteful number, since it uses less digits than its factorization.

61732131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20577380.

The product of its digits is 756, while the sum is 24.

The square root of 61732131 is about 7856.9797632424. The cubic root of 61732131 is about 395.2183400050.

Adding to 61732131 its reverse (13123716), we get a palindrome (74855847).

The spelling of 61732131 in words is "sixty-one million, seven hundred thirty-two thousand, one hundred thirty-one".