2021551038 has 24 divisors (see below), whose sum is σ = 4716952968. Its totient is φ = 622015632.

The previous prime is 2021551009. The next prime is 2021551061. The reversal of 2021551038 is 8301551202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4319320 + ... + 4319787.

It is an arithmetic number, because the mean of its divisors is an integer number (196539707).

Almost surely, 2^2021551038 is an apocalyptic number.

2021551038 is an abundant number, since it is smaller than the sum of its proper divisors (2695401930).

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

2021551038 is a wasteful number, since it uses less digits than its factorization.

2021551038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8639128 (or 8639125 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2021551038 is about 44961.6618687521. The cubic root of 2021551038 is about 1264.4303262771.

It can be divided in two parts, 20215 and 51038, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 2021551038 in words is "two billion, twenty-one million, five hundred fifty-one thousand, thirty-eight".