213504053531 has 12 divisors (see below), whose sum is σ = 225379739232. Its totient is φ = 202224624624.

The previous prime is 213504053471. The next prime is 213504053533. The reversal of 213504053531 is 135350405312.

It is not a de Polignac number, because 213504053531 - 2²⁶ = 213436944667 is a prime.

It is a super-2 number, since 2×213504053531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213504053533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1735790 + ... + 1854716.

It is an arithmetic number, because the mean of its divisors is an integer number (18781644936).

Almost surely, 2^213504053531 is an apocalyptic number.

213504053531 is a deficient number, since it is larger than the sum of its proper divisors (11875685701).

213504053531 is a wasteful number, since it uses less digits than its factorization.

213504053531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123938 (or 123919 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 213504053531 its reverse (135350405312), we get a palindrome (348854458843).

The spelling of 213504053531 in words is "two hundred thirteen billion, five hundred four million, fifty-three thousand, five hundred thirty-one".