71533090 has 8 divisors (see below), whose sum is σ = 128759580. Its totient is φ = 28613232.

The previous prime is 71533087. The next prime is 71533117. The reversal of 71533090 is 9033517.

It can be written as a sum of positive squares in 2 ways, for example, as 68840209 + 2692881 = 8297^2 + 1641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3576645 + ... + 3576664.

Almost surely, 2^71533090 is an apocalyptic number.

71533090 is a deficient number, since it is larger than the sum of its proper divisors (57226490).

71533090 is a wasteful number, since it uses less digits than its factorization.

71533090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7153316.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 71533090 is about 8457.7236890312. The cubic root of 71533090 is about 415.1155433829.

The spelling of 71533090 in words is "seventy-one million, five hundred thirty-three thousand, ninety".