61136331 has 16 divisors (see below), whose sum is σ = 84672000. Its totient is φ = 39208928.

The previous prime is 61136311. The next prime is 61136333. The reversal of 61136331 is 13363116.

It is a cyclic number.

It is not a de Polignac number, because 61136331 - 2¹⁰ = 61135307 is a prime.

It is a super-2 number, since 2×61136331² = 7475301936283122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61136333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4645 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (5292000).

Almost surely, 2^61136331 is an apocalyptic number.

61136331 is a deficient number, since it is larger than the sum of its proper divisors (23535669).

61136331 is a wasteful number, since it uses less digits than its factorization.

61136331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458.

The product of its digits is 972, while the sum is 24.

The square root of 61136331 is about 7818.9725028293. The cubic root of 61136331 is about 393.9427605442.

Adding to 61136331 its reverse (13363116), we get a palindrome (74499447).

The spelling of 61136331 in words is "sixty-one million, one hundred thirty-six thousand, three hundred thirty-one".