213431407 has 8 divisors (see below), whose sum is σ = 248900000. Its totient is φ = 182940912.

The previous prime is 213431369. The next prime is 213431417. The reversal of 213431407 is 704134312.

It is not a de Polignac number, because 213431407 - 2¹⁹ = 212907119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213431417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310782 + ... + 311467.

It is an arithmetic number, because the mean of its divisors is an integer number (31112500).

Almost surely, 2^213431407 is an apocalyptic number.

213431407 is a deficient number, since it is larger than the sum of its proper divisors (35468593).

213431407 is an frugal number, since it uses more digits than its factorization.

213431407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622270 (or 622256 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 213431407 is about 14609.2918035064. The cubic root of 213431407 is about 597.6121829706.

Adding to 213431407 its reverse (704134312), we get a palindrome (917565719).

The spelling of 213431407 in words is "two hundred thirteen million, four hundred thirty-one thousand, four hundred seven".