1971617241 has 32 divisors (see below), whose sum is σ = 2972694528. Its totient is φ = 1151979840.

The previous prime is 1971617233. The next prime is 1971617243. The reversal of 1971617241 is 1427161791.

It is a happy number.

It is not a de Polignac number, because 1971617241 - 2³ = 1971617233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1971617241.

It is not an unprimeable number, because it can be changed into a prime (1971617243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94431 + ... + 113403.

It is an arithmetic number, because the mean of its divisors is an integer number (92896704).

Almost surely, 2^1971617241 is an apocalyptic number.

1971617241 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1971617241 is a deficient number, since it is larger than the sum of its proper divisors (1001077287).

1971617241 is a wasteful number, since it uses less digits than its factorization.

1971617241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19101.

The product of its digits is 21168, while the sum is 39.

The square root of 1971617241 is about 44402.8967636122. The cubic root of 1971617241 is about 1253.9326260005.

It can be divided in two parts, 197161 and 7241, that added together give a palindrome (204402).

The spelling of 1971617241 in words is "one billion, nine hundred seventy-one million, six hundred seventeen thousand, two hundred forty-one".