22021051 has 16 divisors (see below), whose sum is σ = 25288704. Its totient is φ = 19017504.

The previous prime is 22021049. The next prime is 22021093. The reversal of 22021051 is 15012022.

It is not a de Polignac number, because 22021051 - 2¹ = 22021049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13270 + ... + 14836.

It is an arithmetic number, because the mean of its divisors is an integer number (1580544).

Almost surely, 2^22021051 is an apocalyptic number.

22021051 is a deficient number, since it is larger than the sum of its proper divisors (3267653).

22021051 is a wasteful number, since it uses less digits than its factorization.

22021051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 22021051 is about 4692.6592674090. The cubic root of 22021051 is about 280.2932768931.

Adding to 22021051 its reverse (15012022), we get a palindrome (37033073).

The spelling of 22021051 in words is "twenty-two million, twenty-one thousand, fifty-one".