213270531851 has 32 divisors (see below), whose sum is σ = 245427719040. Its totient is φ = 183584249856.

The previous prime is 213270531833. The next prime is 213270531857. The reversal of 213270531851 is 158135072312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213270531851 - 2¹⁰ = 213270530827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213270531857) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11690405 + ... + 11708633.

It is an arithmetic number, because the mean of its divisors is an integer number (7669616220).

Almost surely, 2^213270531851 is an apocalyptic number.

213270531851 is a deficient number, since it is larger than the sum of its proper divisors (32157187189).

213270531851 is a wasteful number, since it uses less digits than its factorization.

213270531851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18743.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 213270531851 in words is "two hundred thirteen billion, two hundred seventy million, five hundred thirty-one thousand, eight hundred fifty-one".