2420521531 has 2 divisors, whose sum is σ = 2420521532. Its totient is φ = 2420521530.

The previous prime is 2420521513. The next prime is 2420521553. The reversal of 2420521531 is 1351250242.

Together with previous prime (2420521513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2420521531 - 2²³ = 2412132923 is a prime.

It is a super-2 number, since 2×2420521531² = 11717848964069167922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2420521496 and 2420521505.

It is not a weakly prime, because it can be changed into another prime (2420521561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210260765 + 1210260766.

It is an arithmetic number, because the mean of its divisors is an integer number (1210260766).

Almost surely, 2^2420521531 is an apocalyptic number.

2420521531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420521531 is an equidigital number, since it uses as much as digits as its factorization.

2420521531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2420521531 is about 49198.7960320169. The cubic root of 2420521531 is about 1342.6711274885.

Adding to 2420521531 its reverse (1351250242), we get a palindrome (3771771773).

The spelling of 2420521531 in words is "two billion, four hundred twenty million, five hundred twenty-one thousand, five hundred thirty-one".