213403472431 has 4 divisors (see below), whose sum is σ = 213415147672. Its totient is φ = 213391797192.

The previous prime is 213403472377. The next prime is 213403472449. The reversal of 213403472431 is 134274304312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213403472431 - 2²³ = 213395083823 is a prime.

It is a super-2 number, since 2×213403472431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213403479431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5810160 + ... + 5846773.

It is an arithmetic number, because the mean of its divisors is an integer number (53353786918).

Almost surely, 2^213403472431 is an apocalyptic number.

213403472431 is the 266711-st hex number.

213403472431 is a deficient number, since it is larger than the sum of its proper divisors (11675241).

213403472431 is a wasteful number, since it uses less digits than its factorization.

213403472431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675240.

The product of its (nonzero) digits is 48384, while the sum is 34.

Adding to 213403472431 its reverse (134274304312), we get a palindrome (347677776743).

The spelling of 213403472431 in words is "two hundred thirteen billion, four hundred three million, four hundred seventy-two thousand, four hundred thirty-one".