2121570520 has 16 divisors (see below), whose sum is σ = 4773533760. Its totient is φ = 848628192.

The previous prime is 2121570499. The next prime is 2121570523. The reversal of 2121570520 is 250751212.

It is a super-2 number, since 2×2121570520² = 9002122942666140800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121570523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26519592 + ... + 26519671.

It is an arithmetic number, because the mean of its divisors is an integer number (298345860).

Almost surely, 2^2121570520 is an apocalyptic number.

2121570520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121570520 is an abundant number, since it is smaller than the sum of its proper divisors (2651963240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121570520 is a wasteful number, since it uses less digits than its factorization.

2121570520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53039274 (or 53039270 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 2121570520 is about 46060.5093328330. The cubic root of 2121570520 is about 1284.9488026355.

The spelling of 2121570520 in words is "two billion, one hundred twenty-one million, five hundred seventy thousand, five hundred twenty".