61031250 has 168 divisors, whose sum is σ = 194997504. Its totient is φ = 13500000.

The previous prime is 61031237. The next prime is 61031251. The reversal of 61031250 is 5213016.

61031250 is a `hidden beast` number, since 610 + 3 + 1 + 2 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61031251) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 1968735 + ... + 1968765.

Almost surely, 2^61031250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61031250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97498752).

61031250 is an abundant number, since it is smaller than the sum of its proper divisors (133966254).

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

61031250 is an equidigital number, since it uses as much as digits as its factorization.

61031250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 61031250 is about 7812.2499959999. The cubic root of 61031250 is about 393.7169284393.

Adding to 61031250 its reverse (5213016), we get a palindrome (66244266).

The spelling of 61031250 in words is "sixty-one million, thirty-one thousand, two hundred fifty".