1521232553 has 16 divisors (see below), whose sum is σ = 1593551232. Its totient is φ = 1450800000.

The previous prime is 1521232507. The next prime is 1521232561. The reversal of 1521232553 is 3552321251.

It is a cyclic number.

It is not a de Polignac number, because 1521232553 - 2¹⁰ = 1521231529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521262553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674678 + ... + 676928.

It is an arithmetic number, because the mean of its divisors is an integer number (99596952).

Almost surely, 2^1521232553 is an apocalyptic number.

It is an amenable number.

1521232553 is a deficient number, since it is larger than the sum of its proper divisors (72318679).

1521232553 is a wasteful number, since it uses less digits than its factorization.

1521232553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656.

The product of its digits is 9000, while the sum is 29.

The square root of 1521232553 is about 39002.9813347647. The cubic root of 1521232553 is about 1150.0901134175.

The spelling of 1521232553 in words is "one billion, five hundred twenty-one million, two hundred thirty-two thousand, five hundred fifty-three".