213777531400 has 48 divisors (see below), whose sum is σ = 513066090240. Its totient is φ = 82752590400.

The previous prime is 213777531389. The next prime is 213777531449. The reversal of 213777531400 is 4135777312.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17233924 + ... + 17246323.

It is an arithmetic number, because the mean of its divisors is an integer number (10688876880).

Almost surely, 2^213777531400 is an apocalyptic number.

213777531400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213777531400 is an abundant number, since it is smaller than the sum of its proper divisors (299288558840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213777531400 is a wasteful number, since it uses less digits than its factorization.

213777531400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34480294 (or 34480285 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 213777531400 in words is "two hundred thirteen billion, seven hundred seventy-seven million, five hundred thirty-one thousand, four hundred".