61431244 has 12 divisors (see below), whose sum is σ = 122862544. Its totient is φ = 26327664.

The previous prime is 61431239. The next prime is 61431247. The reversal of 61431244 is 44213416.

61431244 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (61431247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1096959 + ... + 1097014.

Almost surely, 2^61431244 is an apocalyptic number.

It is an amenable number.

61431244 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.

61431244 is a wasteful number, since it uses less digits than its factorization.

61431244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193984 (or 2193982 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 61431244 is about 7837.8086223127. The cubic root of 61431244 is about 394.5751860779.

The spelling of 61431244 in words is "sixty-one million, four hundred thirty-one thousand, two hundred forty-four".