61971255 has 24 divisors (see below), whose sum is σ = 113071920. Its totient is φ = 31311360.

The previous prime is 61971241. The next prime is 61971311. The reversal of 61971255 is 55217916.

It is not a de Polignac number, because 61971255 - 2⁶ = 61971191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35386 + ... + 37095.

It is an arithmetic number, because the mean of its divisors is an integer number (4711330).

Almost surely, 2^61971255 is an apocalyptic number.

61971255 is a deficient number, since it is larger than the sum of its proper divisors (51100665).

61971255 is a wasteful number, since it uses less digits than its factorization.

61971255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72511 (or 72508 counting only the distinct ones).

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

The square root of 61971255 is about 7872.1823530708. The cubic root of 61971255 is about 395.7279850642.

It can be divided in two parts, 61971 and 255, that added together give a palindrome (62226).

The spelling of 61971255 in words is "sixty-one million, nine hundred seventy-one thousand, two hundred fifty-five".