213777355881 has 16 divisors (see below), whose sum is σ = 297713001600. Its totient is φ = 136191792000.

The previous prime is 213777355879. The next prime is 213777355919. The reversal of 213777355881 is 188553777312.

213777355881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213777355881 - 2¹ = 213777355879 is a prime.

It is a super-2 number, since 2×213777355881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213777355861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1404370 + ... + 1549131.

It is an arithmetic number, because the mean of its divisors is an integer number (18607062600).

Almost surely, 2^213777355881 is an apocalyptic number.

It is an amenable number.

213777355881 is a deficient number, since it is larger than the sum of its proper divisors (83935645719).

213777355881 is a wasteful number, since it uses less digits than its factorization.

213777355881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954576.

The product of its digits is 9878400, while the sum is 57.

The spelling of 213777355881 in words is "two hundred thirteen billion, seven hundred seventy-seven million, three hundred fifty-five thousand, eight hundred eighty-one".