61315800 has 192 divisors, whose sum is σ = 234151680. Its totient is φ = 12925440.

The previous prime is 61315789. The next prime is 61315801. The reversal of 61315800 is 851316.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61315801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54039 + ... + 55161.

It is an arithmetic number, because the mean of its divisors is an integer number (1219540).

Almost surely, 2^61315800 is an apocalyptic number.

61315800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61315800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117075840).

61315800 is an abundant number, since it is smaller than the sum of its proper divisors (172835880).

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

61315800 is a wasteful number, since it uses less digits than its factorization.

61315800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1153 counting only the distinct ones).

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

The square root of 61315800 is about 7830.4406006303. The cubic root of 61315800 is about 394.3278640390.

The spelling of 61315800 in words is "sixty-one million, three hundred fifteen thousand, eight hundred".