2270215521 has 18 divisors (see below), whose sum is σ = 3814580562. Its totient is φ = 1297265760.

The previous prime is 2270215517. The next prime is 2270215523. The reversal of 2270215521 is 1255120722.

2270215521 is a `hidden beast` number, since 22 + 70 + 21 + 552 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1944810000 + 325405521 = 44100^2 + 18039^2 .

It is not a de Polignac number, because 2270215521 - 2² = 2270215517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2270215523) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2573500 + ... + 2574381.

Almost surely, 2^2270215521 is an apocalyptic number.

2270215521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2270215521 is a deficient number, since it is larger than the sum of its proper divisors (1544365041).

2270215521 is a wasteful number, since it uses less digits than its factorization.

2270215521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147901 (or 5147891 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 2270215521 is about 47646.7787053857. The cubic root of 2270215521 is about 1314.2834209289.

The spelling of 2270215521 in words is "two billion, two hundred seventy million, two hundred fifteen thousand, five hundred twenty-one".