61178251 has 2 divisors, whose sum is σ = 61178252. Its totient is φ = 61178250.

The previous prime is 61178239. The next prime is 61178263. The reversal of 61178251 is 15287116.

It is a balanced prime because it is at equal distance from previous prime (61178239) and next prime (61178263).

It is a cyclic number.

It is not a de Polignac number, because 61178251 - 2⁵ = 61178219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61178851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30589125 + 30589126.

It is an arithmetic number, because the mean of its divisors is an integer number (30589126).

Almost surely, 2^61178251 is an apocalyptic number.

61178251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61178251 is an equidigital number, since it uses as much as digits as its factorization.

61178251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 31.

The square root of 61178251 is about 7821.6527025943. The cubic root of 61178251 is about 394.0327796171.

The spelling of 61178251 in words is "sixty-one million, one hundred seventy-eight thousand, two hundred fifty-one".