71220256 has 24 divisors (see below), whose sum is σ = 140403564. Its totient is φ = 35562240.

The previous prime is 71220229. The next prime is 71220269. The reversal of 71220256 is 65202217.

It can be written as a sum of positive squares in 2 ways, for example, as 56010256 + 15210000 = 7484^2 + 3900^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71220256.

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, 43126 + ... + 44746.

Almost surely, 2^71220256 is an apocalyptic number.

It is an amenable number.

71220256 is a deficient number, since it is larger than the sum of its proper divisors (69183308).

71220256 is a wasteful number, since it uses less digits than its factorization.

71220256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004 (or 2996 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 71220256 is about 8439.2094416480. The cubic root of 71220256 is about 414.5095207014.

The spelling of 71220256 in words is "seventy-one million, two hundred twenty thousand, two hundred fifty-six".