147123531 has 12 divisors (see below), whose sum is σ = 214186752. Its totient is φ = 97309296.

The previous prime is 147123523. The next prime is 147123541. The reversal of 147123531 is 135321741.

147123531 is a `hidden beast` number, since 1 + 4 + 7 + 123 + 531 = 666.

147123531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 147123531 - 2³ = 147123523 is a prime.

It is a super-2 number, since 2×147123531² = 43290666747815922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 147123495 and 147123504.

It is not an unprimeable number, because it can be changed into a prime (147123541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63216 + ... + 65501.

It is an arithmetic number, because the mean of its divisors is an integer number (17848896).

Almost surely, 2^147123531 is an apocalyptic number.

147123531 is a deficient number, since it is larger than the sum of its proper divisors (67063221).

147123531 is a wasteful number, since it uses less digits than its factorization.

147123531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128850 (or 128847 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 147123531 is about 12129.4489157587. The cubic root of 147123531 is about 527.9110021312.

The spelling of 147123531 in words is "one hundred forty-seven million, one hundred twenty-three thousand, five hundred thirty-one".