61232131 has 4 divisors (see below), whose sum is σ = 61543152. Its totient is φ = 60921112.

The previous prime is 61232111. The next prime is 61232153. The reversal of 61232131 is 13123216.

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 61232131 - 2¹¹ = 61230083 is a prime.

It is a super-2 number, since 2×61232131² = 7498747733602322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61232099 and 61232108.

It is not an unprimeable number, because it can be changed into a prime (61232111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155215 + ... + 155608.

It is an arithmetic number, because the mean of its divisors is an integer number (15385788).

Almost surely, 2^61232131 is an apocalyptic number.

61232131 is a deficient number, since it is larger than the sum of its proper divisors (311021).

61232131 is a wasteful number, since it uses less digits than its factorization.

61232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311020.

The product of its digits is 216, while the sum is 19.

The square root of 61232131 is about 7825.0962294402. The cubic root of 61232131 is about 394.1484212395.

Adding to 61232131 its reverse (13123216), we get a palindrome (74355347).

The spelling of 61232131 in words is "sixty-one million, two hundred thirty-two thousand, one hundred thirty-one".