61500250 has 64 divisors (see below), whose sum is σ = 133166592. Its totient is φ = 20832000.

The previous prime is 61500223. The next prime is 61500251. The reversal of 61500250 is 5200516.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61500251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197595 + ... + 197905.

It is an arithmetic number, because the mean of its divisors is an integer number (2080728).

Almost surely, 2^61500250 is an apocalyptic number.

61500250 is an abundant number, since it is smaller than the sum of its proper divisors (71666342).

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

61500250 is a wasteful number, since it uses less digits than its factorization.

61500250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 61500250 is about 7842.2095100807. The cubic root of 61500250 is about 394.7228735018.

Adding to 61500250 its reverse (5200516), we get a palindrome (66700766).

The spelling of 61500250 in words is "sixty-one million, five hundred thousand, two hundred fifty".