61681250 has 48 divisors (see below), whose sum is σ = 118117440. Its totient is φ = 24150000.

The previous prime is 61681237. The next prime is 61681267. The reversal of 61681250 is 5218616.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 443681 + ... + 443819.

It is an arithmetic number, because the mean of its divisors is an integer number (2460780).

Almost surely, 2^61681250 is an apocalyptic number.

61681250 is a deficient number, since it is larger than the sum of its proper divisors (56436190).

61681250 is an equidigital number, since it uses as much as digits as its factorization.

61681250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 61681250 is about 7853.7411467402. The cubic root of 61681250 is about 395.1097275674.

Adding to 61681250 its reverse (5218616), we get a palindrome (66899866).

The spelling of 61681250 in words is "sixty-one million, six hundred eighty-one thousand, two hundred fifty".