61204131 has 18 divisors (see below), whose sum is σ = 93916212. Its totient is φ = 38400960.

The previous prime is 61204109. The next prime is 61204139. The reversal of 61204131 is 13140216.

It is a happy number.

It is not a de Polignac number, because 61204131 - 2⁶ = 61204067 is a prime.

It is a super-2 number, since 2×61204131² = 7491891302930322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61204139) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9165 + ... + 14366.

Almost surely, 2^61204131 is an apocalyptic number.

61204131 is a deficient number, since it is larger than the sum of its proper divisors (32712081).

61204131 is a wasteful number, since it uses less digits than its factorization.

61204131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23571 (or 23551 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61204131 is about 7823.3069094853. The cubic root of 61204131 is about 394.0883338408.

Adding to 61204131 its reverse (13140216), we get a palindrome (74344347).

The spelling of 61204131 in words is "sixty-one million, two hundred four thousand, one hundred thirty-one".