147211631 has 6 divisors (see below), whose sum is σ = 171246240. Its totient is φ = 126181356.

The previous prime is 147211609. The next prime is 147211679. The reversal of 147211631 is 136112741.

147211631 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 147211631 - 2¹⁰ = 147210607 is a prime.

It is a super-2 number, since 2×147211631² = 43342528603360322, 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 147211631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147213631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1502111 + ... + 1502208.

It is an arithmetic number, because the mean of its divisors is an integer number (28541040).

Almost surely, 2^147211631 is an apocalyptic number.

147211631 is a deficient number, since it is larger than the sum of its proper divisors (24034609).

147211631 is an equidigital number, since it uses as much as digits as its factorization.

147211631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004333 (or 3004326 counting only the distinct ones).

The product of its digits is 1008, while the sum is 26.

The square root of 147211631 is about 12133.0800294072. The cubic root of 147211631 is about 528.0163550470.

The spelling of 147211631 in words is "one hundred forty-seven million, two hundred eleven thousand, six hundred thirty-one".