61122231 has 12 divisors (see below), whose sum is σ = 90166752. Its totient is φ = 39880896.

The previous prime is 61122223. The next prime is 61122239. The reversal of 61122231 is 13222116.

61122231 is a `hidden beast` number, since 611 + 2 + 22 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (61122223) and next prime (61122239).

It is not a de Polignac number, because 61122231 - 2³ = 61122223 is a prime.

It is a super-2 number, since 2×61122231² = 7471854244834722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61122239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71826 + ... + 72671.

It is an arithmetic number, because the mean of its divisors is an integer number (7513896).

Almost surely, 2^61122231 is an apocalyptic number.

61122231 is a deficient number, since it is larger than the sum of its proper divisors (29044521).

61122231 is a wasteful number, since it uses less digits than its factorization.

61122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144550 (or 144547 counting only the distinct ones).

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

The square root of 61122231 is about 7818.0707978375. The cubic root of 61122231 is about 393.9124729345.

Adding to 61122231 its reverse (13222116), we get a palindrome (74344347).

The spelling of 61122231 in words is "sixty-one million, one hundred twenty-two thousand, two hundred thirty-one".