61231830 has 32 divisors (see below), whose sum is σ = 160316928. Its totient is φ = 14844000.

The previous prime is 61231823. The next prime is 61231843. The reversal of 61231830 is 3813216.

It is a self number, because there is not a number n which added to its sum of digits gives 61231830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92446 + ... + 93105.

It is an arithmetic number, because the mean of its divisors is an integer number (5009904).

Almost surely, 2^61231830 is an apocalyptic number.

61231830 is an abundant number, since it is smaller than the sum of its proper divisors (99085098).

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

61231830 is a wasteful number, since it uses less digits than its factorization.

61231830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185572.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 61231830 is about 7825.0769964263. The cubic root of 61231830 is about 394.1477753974.

The spelling of 61231830 in words is "sixty-one million, two hundred thirty-one thousand, eight hundred thirty".