61310900 has 36 divisors (see below), whose sum is σ = 152052768. Its totient is φ = 21020640.

The previous prime is 61310897. The next prime is 61310911. The reversal of 61310900 is 901316.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43094 + ... + 44493.

It is an arithmetic number, because the mean of its divisors is an integer number (4223688).

Almost surely, 2^61310900 is an apocalyptic number.

It is an amenable number.

61310900 is an abundant number, since it is smaller than the sum of its proper divisors (90741868).

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

61310900 is a wasteful number, since it uses less digits than its factorization.

61310900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87608 (or 87601 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 61310900 is about 7830.1277128793. The cubic root of 61310900 is about 394.3173596339.

The spelling of 61310900 in words is "sixty-one million, three hundred ten thousand, nine hundred".