147111561 has 6 divisors (see below), whose sum is σ = 212494490. Its totient is φ = 98074368.

The previous prime is 147111553. The next prime is 147111563. The reversal of 147111561 is 165111741.

It can be written as a sum of positive squares in only one way, i.e., 135001161 + 12110400 = 11619^2 + 3480^2 .

It is not a de Polignac number, because 147111561 - 2³ = 147111553 is a prime.

It is a super-2 number, since 2×147111561² = 43283622759713442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147111563) 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 5 ways as a sum of consecutive naturals, for example, 8172856 + ... + 8172873.

Almost surely, 2^147111561 is an apocalyptic number.

It is an amenable number.

147111561 is a deficient number, since it is larger than the sum of its proper divisors (65382929).

147111561 is a wasteful number, since it uses less digits than its factorization.

147111561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16345735 (or 16345732 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 147111561 is about 12128.9554785233. The cubic root of 147111561 is about 527.8966847612.

The spelling of 147111561 in words is "one hundred forty-seven million, one hundred eleven thousand, five hundred sixty-one".