1617232081 has 2 divisors, whose sum is σ = 1617232082. Its totient is φ = 1617232080.

The previous prime is 1617232039. The next prime is 1617232093. The reversal of 1617232081 is 1802327161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1566893056 + 50339025 = 39584^2 + 7095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617232081 - 2¹¹ = 1617230033 is a prime.

It is a super-2 number, since 2×1617232081² = 5230879207631181122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1617232181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808616040 + 808616041.

It is an arithmetic number, because the mean of its divisors is an integer number (808616041).

Almost surely, 2^1617232081 is an apocalyptic number.

It is an amenable number.

1617232081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617232081 is an equidigital number, since it uses as much as digits as its factorization.

1617232081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1617232081 is about 40214.8241448349. The cubic root of 1617232081 is about 1173.7910198910.

The spelling of 1617232081 in words is "one billion, six hundred seventeen million, two hundred thirty-two thousand, eighty-one".