61877251 has 2 divisors, whose sum is σ = 61877252. Its totient is φ = 61877250.

The previous prime is 61877237. The next prime is 61877267. The reversal of 61877251 is 15277816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61877251 - 2⁵ = 61877219 is a prime.

It is a pancake number, because a pancake can be divided into 61877251 parts by 11124 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 61877251.

It is not a weakly prime, because it can be changed into another prime (61877951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30938625 + 30938626.

It is an arithmetic number, because the mean of its divisors is an integer number (30938626).

Almost surely, 2^61877251 is an apocalyptic number.

61877251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61877251 is an equidigital number, since it uses as much as digits as its factorization.

61877251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 37.

The square root of 61877251 is about 7866.2094429274. The cubic root of 61877251 is about 395.5277909640.

It can be divided in two parts, 61877 and 251, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 61877251 in words is "sixty-one million, eight hundred seventy-seven thousand, two hundred fifty-one".