2021959125 has 64 divisors (see below), whose sum is σ = 3761072640. Its totient is φ = 1071835200.

The previous prime is 2021959123. The next prime is 2021959151. The reversal of 2021959125 is 5219591202.

It is a happy number.

2021959125 is a `hidden beast` number, since 20 + 21 + 9 + 591 + 25 = 666.

It is not a de Polignac number, because 2021959125 - 2¹ = 2021959123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021959125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021959123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 582144 + ... + 585606.

It is an arithmetic number, because the mean of its divisors is an integer number (58766760).

Almost surely, 2^2021959125 is an apocalyptic number.

2021959125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021959125 is a deficient number, since it is larger than the sum of its proper divisors (1739113515).

2021959125 is a wasteful number, since it uses less digits than its factorization.

2021959125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660 (or 3644 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 2021959125 is about 44966.1998060766. The cubic root of 2021959125 is about 1264.5154033379.

It can be divided in two parts, 2021959 and 125, that added together give a square (2022084 = 1422²).

The spelling of 2021959125 in words is "two billion, twenty-one million, nine hundred fifty-nine thousand, one hundred twenty-five".