71531229 has 48 divisors (see below), whose sum is σ = 125024256. Its totient is φ = 35935200.

The previous prime is 71531221. The next prime is 71531269. The reversal of 71531229 is 92213517.

It is not a de Polignac number, because 71531229 - 2³ = 71531221 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71531196 and 71531205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71531221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49414 + ... + 50840.

It is an arithmetic number, because the mean of its divisors is an integer number (2604672).

Almost surely, 2^71531229 is an apocalyptic number.

It is an amenable number.

71531229 is a deficient number, since it is larger than the sum of its proper divisors (53493027).

71531229 is a wasteful number, since it uses less digits than its factorization.

71531229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1479 counting only the distinct ones).

The product of its digits is 3780, while the sum is 30.

The square root of 71531229 is about 8457.6136705338. The cubic root of 71531229 is about 415.1119434791. Note that the first 3 decimals are identical.

The spelling of 71531229 in words is "seventy-one million, five hundred thirty-one thousand, two hundred twenty-nine".