147512231 has 4 divisors (see below), whose sum is σ = 150942792. Its totient is φ = 144081672.

The previous prime is 147512203. The next prime is 147512237. The reversal of 147512231 is 132215741.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 147512231 - 2¹⁴ = 147495847 is a prime.

It is a super-2 number, since 2×147512231² = 43519716589194722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 147512231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147512237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1715216 + ... + 1715301.

It is an arithmetic number, because the mean of its divisors is an integer number (37735698).

Almost surely, 2^147512231 is an apocalyptic number.

147512231 is a deficient number, since it is larger than the sum of its proper divisors (3430561).

147512231 is an equidigital number, since it uses as much as digits as its factorization.

147512231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430560.

The product of its digits is 1680, while the sum is 26.

The square root of 147512231 is about 12145.4613333541. The cubic root of 147512231 is about 528.3755064793.

Adding to 147512231 its reverse (132215741), we get a palindrome (279727972).

The spelling of 147512231 in words is "one hundred forty-seven million, five hundred twelve thousand, two hundred thirty-one".