71229236 has 12 divisors (see below), whose sum is σ = 134239812. Its totient is φ = 32875008.

The previous prime is 71229209. The next prime is 71229247. The reversal of 71229236 is 63292217.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26419600 + 44809636 = 5140^2 + 6694^2 .

It is a super-2 number, since 2×71229236² = 10147208122287392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684845 + ... + 684948.

It is an arithmetic number, because the mean of its divisors is an integer number (11186651).

Almost surely, 2^71229236 is an apocalyptic number.

It is an amenable number.

71229236 is a deficient number, since it is larger than the sum of its proper divisors (63010576).

71229236 is a wasteful number, since it uses less digits than its factorization.

71229236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369810 (or 1369808 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 71229236 is about 8439.7414652346. The cubic root of 71229236 is about 414.5269414900.

The spelling of 71229236 in words is "seventy-one million, two hundred twenty-nine thousand, two hundred thirty-six".