130611561 has 16 divisors (see below), whose sum is σ = 184624128. Its totient is φ = 81849600.

The previous prime is 130611541. The next prime is 130611571. The reversal of 130611561 is 165116031.

It is not a de Polignac number, because 130611561 - 2⁶ = 130611497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (130611541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74151 + ... + 75891.

It is an arithmetic number, because the mean of its divisors is an integer number (11539008).

Almost surely, 2^130611561 is an apocalyptic number.

It is an amenable number.

130611561 is a deficient number, since it is larger than the sum of its proper divisors (54012567).

130611561 is a wasteful number, since it uses less digits than its factorization.

130611561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 130611561 is about 11428.5415079965. The cubic root of 130611561 is about 507.3728297278.

Adding to 130611561 its reverse (165116031), we get a palindrome (295727592).

The spelling of 130611561 in words is "one hundred thirty million, six hundred eleven thousand, five hundred sixty-one".