213777531399 has 16 divisors (see below), whose sum is σ = 300493987200. Its totient is φ = 134812482336.

The previous prime is 213777531389. The next prime is 213777531449. The reversal of 213777531399 is 993135777312.

It is a happy number.

It is not a de Polignac number, because 213777531399 - 2¹³ = 213777523207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213777531389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2808024 + ... + 2883149.

It is an arithmetic number, because the mean of its divisors is an integer number (18780874200).

Almost surely, 2^213777531399 is an apocalyptic number.

213777531399 is a deficient number, since it is larger than the sum of its proper divisors (86716455801).

213777531399 is a wasteful number, since it uses less digits than its factorization.

213777531399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691854.

The product of its digits is 7501410, while the sum is 57.

The spelling of 213777531399 in words is "two hundred thirteen billion, seven hundred seventy-seven million, five hundred thirty-one thousand, three hundred ninety-nine".