61200531 has 24 divisors (see below), whose sum is σ = 102941280. Its totient is φ = 34310016.

The previous prime is 61200521. The next prime is 61200563. The reversal of 61200531 is 13500216.

61200531 is a `hidden beast` number, since 612 + 0 + 0 + 53 + 1 = 666.

It is not a de Polignac number, because 61200531 - 2⁶ = 61200467 is a prime.

It is a super-2 number, since 2×61200531² = 7491009989363922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61200511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5826 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (4289220).

Almost surely, 2^61200531 is an apocalyptic number.

61200531 is a deficient number, since it is larger than the sum of its proper divisors (41740749).

61200531 is a wasteful number, since it uses less digits than its factorization.

61200531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18395 (or 18392 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 61200531 is about 7823.0768243703. The cubic root of 61200531 is about 394.0806069886.

Adding to 61200531 its reverse (13500216), we get a palindrome (74700747).

The spelling of 61200531 in words is "sixty-one million, two hundred thousand, five hundred thirty-one".