213880737755 has 4 divisors (see below), whose sum is σ = 256656885312. Its totient is φ = 171104590200.

The previous prime is 213880737731. The next prime is 213880737793. The reversal of 213880737755 is 557737088312.

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

It is a de Polignac number, because none of the positive numbers 2^k-213880737755 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213880737755.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21388073771 + ... + 21388073780.

It is an arithmetic number, because the mean of its divisors is an integer number (64164221328).

Almost surely, 2^213880737755 is an apocalyptic number.

213880737755 is a deficient number, since it is larger than the sum of its proper divisors (42776147557).

213880737755 is an equidigital number, since it uses as much as digits as its factorization.

213880737755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42776147556.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The spelling of 213880737755 in words is "two hundred thirteen billion, eight hundred eighty million, seven hundred thirty-seven thousand, seven hundred fifty-five".