61318500 has 48 divisors (see below), whose sum is σ = 178563840. Its totient is φ = 16351200.

The previous prime is 61318489. The next prime is 61318519. The reversal of 61318500 is 581316.

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, 18940 + ... + 21939.

It is an arithmetic number, because the mean of its divisors is an integer number (3720080).

Almost surely, 2^61318500 is an apocalyptic number.

61318500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61318500 is an abundant number, since it is smaller than the sum of its proper divisors (117245340).

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

61318500 is a wasteful number, since it uses less digits than its factorization.

61318500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40901 (or 40889 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 61318500 is about 7830.6130028242. The cubic root of 61318500 is about 394.3336519414. Note that the first 3 decimals are identical.

Adding to 61318500 its reverse (581316), we get a palindrome (61899816).

The spelling of 61318500 in words is "sixty-one million, three hundred eighteen thousand, five hundred".