212315253131 has 4 divisors (see below), whose sum is σ = 214263099600. Its totient is φ = 210367406664.

The previous prime is 212315253079. The next prime is 212315253191. The reversal of 212315253131 is 131352513212.

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 212315253131 - 2³⁰ = 211241511307 is a prime.

It is a super-2 number, since 2×212315253131² (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 = 212315253094 and 212315253103.

It is not an unprimeable number, because it can be changed into a prime (212315253191) 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, 973923071 + ... + 973923288.

It is an arithmetic number, because the mean of its divisors is an integer number (53565774900).

Almost surely, 2^212315253131 is an apocalyptic number.

212315253131 is a deficient number, since it is larger than the sum of its proper divisors (1947846469).

212315253131 is a wasteful number, since it uses less digits than its factorization.

212315253131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947846468.

The product of its digits is 5400, while the sum is 29.

Adding to 212315253131 its reverse (131352513212), we get a palindrome (343667766343).

The spelling of 212315253131 in words is "two hundred twelve billion, three hundred fifteen million, two hundred fifty-three thousand, one hundred thirty-one".