2421531023 has 4 divisors (see below), whose sum is σ = 2429795928. Its totient is φ = 2413266120.

The previous prime is 2421530977. The next prime is 2421531037. The reversal of 2421531023 is 3201351242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201351242 = 2 ⋅1600675621.

It is a cyclic number.

It is not a de Polignac number, because 2421531023 - 2¹² = 2421526927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2421531023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421531083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4132013 + ... + 4132598.

It is an arithmetic number, because the mean of its divisors is an integer number (607448982).

Almost surely, 2^2421531023 is an apocalyptic number.

2421531023 is a deficient number, since it is larger than the sum of its proper divisors (8264905).

2421531023 is an equidigital number, since it uses as much as digits as its factorization.

2421531023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264904.

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

The square root of 2421531023 is about 49209.0542786589. The cubic root of 2421531023 is about 1342.8577577057.

Adding to 2421531023 its reverse (3201351242), we get a palindrome (5622882265).

The spelling of 2421531023 in words is "two billion, four hundred twenty-one million, five hundred thirty-one thousand, twenty-three".