213213473 has 32 divisors (see below), whose sum is σ = 260340480. Its totient is φ = 172226560.

The previous prime is 213213449. The next prime is 213213503. The reversal of 213213473 is 374312312.

It is not a de Polignac number, because 213213473 - 2²² = 209019169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213213673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 382511 + ... + 383067.

It is an arithmetic number, because the mean of its divisors is an integer number (8135640).

Almost surely, 2^213213473 is an apocalyptic number.

213213473 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

213213473 is a deficient number, since it is larger than the sum of its proper divisors (47127007).

213213473 is a wasteful number, since it uses less digits than its factorization.

213213473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697.

The product of its digits is 3024, while the sum is 26.

The square root of 213213473 is about 14601.8311522905. The cubic root of 213213473 is about 597.4087071878.

Adding to 213213473 its reverse (374312312), we get a palindrome (587525785).

The spelling of 213213473 in words is "two hundred thirteen million, two hundred thirteen thousand, four hundred seventy-three".