61551250 has 40 divisors (see below), whose sum is σ = 118284012. Its totient is φ = 24000000.

The previous prime is 61551233. The next prime is 61551263. The reversal of 61551250 is 5215516.

61551250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 40030929 + 21520321 = 6327^2 + 4639^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50650 + ... + 51850.

Almost surely, 2^61551250 is an apocalyptic number.

61551250 is a deficient number, since it is larger than the sum of its proper divisors (56732762).

61551250 is a wasteful number, since it uses less digits than its factorization.

61551250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 61551250 is about 7845.4604708710. The cubic root of 61551250 is about 394.8319532996.

Adding to 61551250 its reverse (5215516), we get a palindrome (66766766).

The spelling of 61551250 in words is "sixty-one million, five hundred fifty-one thousand, two hundred fifty".