2231403521 has 8 divisors (see below), whose sum is σ = 2311903080. Its totient is φ = 2151140992.

The previous prime is 2231403481. The next prime is 2231403539. The reversal of 2231403521 is 1253041322.

It can be written as a sum of positive squares in 4 ways, for example, as 16289296 + 2215114225 = 4036^2 + 47065^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2231403521 - 2¹⁰ = 2231402497 is a prime.

It is a super-3 number, since 3×2231403521³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231403571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39980 + ... + 77853.

It is an arithmetic number, because the mean of its divisors is an integer number (288987885).

Almost surely, 2^2231403521 is an apocalyptic number.

It is an amenable number.

2231403521 is a deficient number, since it is larger than the sum of its proper divisors (80499559).

2231403521 is a wasteful number, since it uses less digits than its factorization.

2231403521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118515.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2231403521 is about 47237.7340798646. The cubic root of 2231403521 is about 1306.7505894647.

Adding to 2231403521 its reverse (1253041322), we get a palindrome (3484444843).

The spelling of 2231403521 in words is "two billion, two hundred thirty-one million, four hundred three thousand, five hundred twenty-one".