61255971 has 24 divisors (see below), whose sum is σ = 101343840. Its totient is φ = 34926336.

The previous prime is 61255963. The next prime is 61255973. The reversal of 61255971 is 17955216.

61255971 is a `hidden beast` number, since 61 + 2 + 5 + 597 + 1 = 666.

61255971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61255971 - 2³ = 61255963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61255973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40395 + ... + 41883.

It is an arithmetic number, because the mean of its divisors is an integer number (4222660).

Almost surely, 2^61255971 is an apocalyptic number.

61255971 is a deficient number, since it is larger than the sum of its proper divisors (40087869).

61255971 is a wasteful number, since it uses less digits than its factorization.

61255971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2152 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 61255971 is about 7826.6193851496. The cubic root of 61255971 is about 394.1995669316.

It can be divided in two parts, 61255 and 971, that added together give a palindrome (62226).

The spelling of 61255971 in words is "sixty-one million, two hundred fifty-five thousand, nine hundred seventy-one".