61231156 has 12 divisors (see below), whose sum is σ = 122462368. Its totient is φ = 26241912.

The previous prime is 61231141. The next prime is 61231187. The reversal of 61231156 is 65113216.

61231156 is an admirable number.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 61231156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093386 + ... + 1093441.

Almost surely, 2^61231156 is an apocalyptic number.

It is an amenable number.

61231156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61231156 is a wasteful number, since it uses less digits than its factorization.

61231156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186838 (or 2186836 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 61231156 is about 7825.0339296389. The cubic root of 61231156 is about 394.1463292183.

The spelling of 61231156 in words is "sixty-one million, two hundred thirty-one thousand, one hundred fifty-six".