213256275557 has 12 divisors (see below), whose sum is σ = 243076294080. Its totient is φ = 186491315088.

The previous prime is 213256275541. The next prime is 213256275559. The reversal of 213256275557 is 755572652312.

It is not a de Polignac number, because 213256275557 - 2⁴ = 213256275541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213256275559) 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, 33203933 + ... + 33210354.

It is an arithmetic number, because the mean of its divisors is an integer number (20256357840).

Almost surely, 2^213256275557 is an apocalyptic number.

It is an amenable number.

213256275557 is a deficient number, since it is larger than the sum of its proper divisors (29820018523).

213256275557 is a wasteful number, since it uses less digits than its factorization.

213256275557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66414332 (or 66414319 counting only the distinct ones).

The product of its digits is 4410000, while the sum is 50.

The spelling of 213256275557 in words is "two hundred thirteen billion, two hundred fifty-six million, two hundred seventy-five thousand, five hundred fifty-seven".