213032431 has 2 divisors, whose sum is σ = 213032432. Its totient is φ = 213032430.

The previous prime is 213032419. The next prime is 213032483. The reversal of 213032431 is 134230312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213032431 - 2¹³ = 213024239 is a prime.

It is a super-2 number, since 2×213032431² = 90765633315539522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213032399 and 213032408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213032401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106516215 + 106516216.

It is an arithmetic number, because the mean of its divisors is an integer number (106516216).

Almost surely, 2^213032431 is an apocalyptic number.

213032431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213032431 is an equidigital number, since it uses as much as digits as its factorization.

213032431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 213032431 is about 14595.6305447898. The cubic root of 213032431 is about 597.2395704500.

Adding to 213032431 its reverse (134230312), we get a palindrome (347262743).

The spelling of 213032431 in words is "two hundred thirteen million, thirty-two thousand, four hundred thirty-one".