213491400 has 48 divisors (see below), whose sum is σ = 661825200. Its totient is φ = 56930880.

The previous prime is 213491393. The next prime is 213491401. The reversal of 213491400 is 4194312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (213491401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177310 + ... + 178509.

It is an arithmetic number, because the mean of its divisors is an integer number (13788025).

Almost surely, 2^213491400 is an apocalyptic number.

213491400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213491400 is an abundant number, since it is smaller than the sum of its proper divisors (448333800).

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

213491400 is a wasteful number, since it uses less digits than its factorization.

213491400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355838 (or 355829 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 213491400 is about 14611.3449072972. The cubic root of 213491400 is about 597.6681715893.

The spelling of 213491400 in words is "two hundred thirteen million, four hundred ninety-one thousand, four hundred".