213791400 has 288 divisors, whose sum is σ = 767763360. Its totient is φ = 55261440.

The previous prime is 213791381. The next prime is 213791429. The reversal of 213791400 is 4197312.

213791400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2575759 + ... + 2575841.

It is an arithmetic number, because the mean of its divisors is an integer number (2665845).

Almost surely, 2^213791400 is an apocalyptic number.

213791400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213791400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383881680).

213791400 is an abundant number, since it is smaller than the sum of its proper divisors (553971960).

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

213791400 is a wasteful number, since it uses less digits than its factorization.

213791400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 213791400 is about 14621.6072987890. The cubic root of 213791400 is about 597.9479900927.

The spelling of 213791400 in words is "two hundred thirteen million, seven hundred ninety-one thousand, four hundred".