2021422551 has 32 divisors (see below), whose sum is σ = 2846638080. Its totient is φ = 1273434624.

The previous prime is 2021422511. The next prime is 2021422567. The reversal of 2021422551 is 1552241202.

It is not a de Polignac number, because 2021422551 - 2¹⁰ = 2021421527 is a prime.

It is a super-2 number, since 2×2021422551² = 8172298259382695202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021422511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3408511 + ... + 3409103.

It is an arithmetic number, because the mean of its divisors is an integer number (88957440).

Almost surely, 2^2021422551 is an apocalyptic number.

2021422551 is a deficient number, since it is larger than the sum of its proper divisors (825215529).

2021422551 is a wasteful number, since it uses less digits than its factorization.

2021422551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 2021422551 is about 44960.2329953927. The cubic root of 2021422551 is about 1264.4035372262.

Adding to 2021422551 its reverse (1552241202), we get a palindrome (3573663753).

The spelling of 2021422551 in words is "two billion, twenty-one million, four hundred twenty-two thousand, five hundred fifty-one".