61317250 has 16 divisors (see below), whose sum is σ = 114786360. Its totient is φ = 24526800.

The previous prime is 61317247. The next prime is 61317253. The reversal of 61317250 is 5271316.

It is an interprime number because it is at equal distance from previous prime (61317247) and next prime (61317253).

It can be written as a sum of positive squares in 4 ways, for example, as 30481441 + 30835809 = 5521^2 + 5553^2 .

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 (61317253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122385 + ... + 122884.

Almost surely, 2^61317250 is an apocalyptic number.

61317250 is a deficient number, since it is larger than the sum of its proper divisors (53469110).

61317250 is a wasteful number, since it uses less digits than its factorization.

61317250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245286 (or 245276 counting only the distinct ones).

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

The square root of 61317250 is about 7830.5331874656. The cubic root of 61317250 is about 394.3309723781.

Adding to 61317250 its reverse (5271316), we get a palindrome (66588566).

The spelling of 61317250 in words is "sixty-one million, three hundred seventeen thousand, two hundred fifty".