1022161521 has 32 divisors (see below), whose sum is σ = 1430784000. Its totient is φ = 648273920.

The previous prime is 1022161513. The next prime is 1022161559. The reversal of 1022161521 is 1251612201.

It is a cyclic number.

It is not a de Polignac number, because 1022161521 - 2³ = 1022161513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1022169521) 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, 2276305 + ... + 2276753.

It is an arithmetic number, because the mean of its divisors is an integer number (44712000).

Almost surely, 2^1022161521 is an apocalyptic number.

It is an amenable number.

1022161521 is a deficient number, since it is larger than the sum of its proper divisors (408622479).

1022161521 is a wasteful number, since it uses less digits than its factorization.

1022161521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1022161521 is about 31971.2608603414. The cubic root of 1022161521 is about 1007.3332654316. Note that the first 3 decimals are identical.

Adding to 1022161521 its reverse (1251612201), we get a palindrome (2273773722).

The spelling of 1022161521 in words is "one billion, twenty-two million, one hundred sixty-one thousand, five hundred twenty-one".