10420213531 has 48 divisors (see below), whose sum is σ = 13283827200. Its totient is φ = 8100691200.

The previous prime is 10420213513. The next prime is 10420213543. The reversal of 10420213531 is 13531202401.

It is a happy number.

It is not a de Polignac number, because 10420213531 - 2⁷ = 10420213403 is a prime.

It is a super-2 number, since 2×10420213531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10420213571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9585670 + ... + 9586756.

It is an arithmetic number, because the mean of its divisors is an integer number (276746400).

Almost surely, 2^10420213531 is an apocalyptic number.

10420213531 is a deficient number, since it is larger than the sum of its proper divisors (2863613669).

10420213531 is a wasteful number, since it uses less digits than its factorization.

10420213531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 10420213531 its reverse (13531202401), we get a palindrome (23951415932).

The spelling of 10420213531 in words is "ten billion, four hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".