1521404222 has 16 divisors (see below), whose sum is σ = 2602221552. Its totient is φ = 660881280.

The previous prime is 1521404189. The next prime is 1521404243. The reversal of 1521404222 is 2224041251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720604 + ... + 1721487.

It is an arithmetic number, because the mean of its divisors is an integer number (162638847).

Almost surely, 2^1521404222 is an apocalyptic number.

1521404222 is a deficient number, since it is larger than the sum of its proper divisors (1080817330).

1521404222 is a wasteful number, since it uses less digits than its factorization.

1521404222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442123.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1521404222 is about 39005.1819890640. The cubic root of 1521404222 is about 1150.1333738190.

Adding to 1521404222 its reverse (2224041251), we get a palindrome (3745445473).

The spelling of 1521404222 in words is "one billion, five hundred twenty-one million, four hundred four thousand, two hundred twenty-two".