61731250 has 96 divisors (see below), whose sum is σ = 141740928. Its totient is φ = 19680000.

The previous prime is 61731223. The next prime is 61731251. The reversal of 61731250 is 5213716.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (61731251) 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, 743709 + ... + 743791.

It is an arithmetic number, because the mean of its divisors is an integer number (1476468).

Almost surely, 2^61731250 is an apocalyptic number.

61731250 is an abundant number, since it is smaller than the sum of its proper divisors (80009678).

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

61731250 is an equidigital number, since it uses as much as digits as its factorization.

61731250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61731250 is about 7856.9236982422. The cubic root of 61731250 is about 395.2164598981.

Adding to 61731250 its reverse (5213716), we get a palindrome (66944966).

The spelling of 61731250 in words is "sixty-one million, seven hundred thirty-one thousand, two hundred fifty".