61021131 has 8 divisors (see below), whose sum is σ = 81397824. Its totient is φ = 40662600.

The previous prime is 61021127. The next prime is 61021151. The reversal of 61021131 is 13112016.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61021131 - 2² = 61021127 is a prime.

It is a super-2 number, since 2×61021131² = 7447156857038322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61021131.

It is not an unprimeable number, because it can be changed into a prime (61021111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9556 + ... + 14606.

It is an arithmetic number, because the mean of its divisors is an integer number (10174728).

Almost surely, 2^61021131 is an apocalyptic number.

61021131 is a deficient number, since it is larger than the sum of its proper divisors (20376693).

61021131 is a wasteful number, since it uses less digits than its factorization.

61021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9081.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 61021131 is about 7811.6023324283. The cubic root of 61021131 is about 393.6951677740.

Adding to 61021131 its reverse (13112016), we get a palindrome (74133147).

The spelling of 61021131 in words is "sixty-one million, twenty-one thousand, one hundred thirty-one".