61931250 has 96 divisors (see below), whose sum is σ = 172488960. Its totient is φ = 16470000.

The previous prime is 61931239. The next prime is 61931257. The reversal of 61931250 is 5213916.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61931257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 168567 + ... + 168933.

It is an arithmetic number, because the mean of its divisors is an integer number (1796760).

Almost surely, 2^61931250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61931250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86244480).

61931250 is an abundant number, since it is smaller than the sum of its proper divisors (110557710).

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

61931250 is an equidigital number, since it uses as much as digits as its factorization.

61931250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 61931250 is about 7869.6410337448. The cubic root of 61931250 is about 395.6428138247.

The spelling of 61931250 in words is "sixty-one million, nine hundred thirty-one thousand, two hundred fifty".