213702431 has 2 divisors, whose sum is σ = 213702432. Its totient is φ = 213702430.

The previous prime is 213702409. The next prime is 213702449. The reversal of 213702431 is 134207312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213702431 - 2¹⁴ = 213686047 is a prime.

It is a super-2 number, since 2×213702431² = 91337458030619522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 213702397 and 213702406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213701431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106851215 + 106851216.

It is an arithmetic number, because the mean of its divisors is an integer number (106851216).

Almost surely, 2^213702431 is an apocalyptic number.

213702431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213702431 is an equidigital number, since it uses as much as digits as its factorization.

213702431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 213702431 is about 14618.5646012185. The cubic root of 213702431 is about 597.8650335036.

Adding to 213702431 its reverse (134207312), we get a palindrome (347909743).

The spelling of 213702431 in words is "two hundred thirteen million, seven hundred two thousand, four hundred thirty-one".