2021025164 has 12 divisors (see below), whose sum is σ = 3537364488. Its totient is φ = 1010349600.

The previous prime is 2021025133. The next prime is 2021025173. The reversal of 2021025164 is 4615201202.

It is a happy number.

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, 10322 + ... + 64409.

It is an arithmetic number, because the mean of its divisors is an integer number (294780374).

Almost surely, 2^2021025164 is an apocalyptic number.

It is an amenable number.

2021025164 is a deficient number, since it is larger than the sum of its proper divisors (1516339324).

2021025164 is a wasteful number, since it uses less digits than its factorization.

2021025164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81496 (or 81494 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2021025164 is about 44955.8134616648. The cubic root of 2021025164 is about 1264.3206763621.

Adding to 2021025164 its reverse (4615201202), we get a palindrome (6636226366).

The spelling of 2021025164 in words is "two billion, twenty-one million, twenty-five thousand, one hundred sixty-four".