212210503531 has 4 divisors (see below), whose sum is σ = 228534388432. Its totient is φ = 195886618632.

The previous prime is 212210503529. The next prime is 212210503541. The reversal of 212210503531 is 135305012212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212210503531 - 2¹ = 212210503529 is a prime.

It is a super-2 number, since 2×212210503531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212210503496 and 212210503505.

It is not an unprimeable number, because it can be changed into a prime (212210503541) 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, 8161942431 + ... + 8161942456.

It is an arithmetic number, because the mean of its divisors is an integer number (57133597108).

Almost surely, 2^212210503531 is an apocalyptic number.

212210503531 is a deficient number, since it is larger than the sum of its proper divisors (16323884901).

212210503531 is a wasteful number, since it uses less digits than its factorization.

212210503531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16323884900.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 212210503531 its reverse (135305012212), we get a palindrome (347515515743).

The spelling of 212210503531 in words is "two hundred twelve billion, two hundred ten million, five hundred three thousand, five hundred thirty-one".