61651125 has 40 divisors (see below), whose sum is σ = 114954840. Its totient is φ = 32875200.

The previous prime is 61651123. The next prime is 61651133. The reversal of 61651125 is 52115616.

It is a happy number.

61651125 is a `hidden beast` number, since 6 + 1 + 651 + 1 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7584516 + 54066609 = 2754^2 + 7353^2 .

It is not a de Polignac number, because 61651125 - 2¹ = 61651123 is a prime.

It is a super-2 number, since 2×61651125² = 7601722427531250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61651123) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7081 + ... + 13169.

It is an arithmetic number, because the mean of its divisors is an integer number (2873871).

Almost surely, 2^61651125 is an apocalyptic number.

It is an amenable number.

61651125 is a deficient number, since it is larger than the sum of its proper divisors (53303715).

61651125 is an equidigital number, since it uses as much as digits as its factorization.

61651125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6116 (or 6097 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 61651125 is about 7851.8230367221. The cubic root of 61651125 is about 395.0453934906.

It can be divided in two parts, 61651 and 125, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61651125 in words is "sixty-one million, six hundred fifty-one thousand, one hundred twenty-five".