61312230 has 72 divisors (see below), whose sum is σ = 185451552. Its totient is φ = 14013216.

The previous prime is 61312201. The next prime is 61312243. The reversal of 61312230 is 3221316.

61312230 is a `hidden beast` number, since 613 + 1 + 22 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2542 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (2575716).

Almost surely, 2^61312230 is an apocalyptic number.

61312230 is an abundant number, since it is smaller than the sum of its proper divisors (124139322).

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

61312230 is a wasteful number, since it uses less digits than its factorization.

61312230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13930 (or 13920 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 61312230 is about 7830.2126407908. The cubic root of 61312230 is about 394.3202108849.

Adding to 61312230 its reverse (3221316), we get a palindrome (64533546).

The spelling of 61312230 in words is "sixty-one million, three hundred twelve thousand, two hundred thirty".