213532457 has 2 divisors, whose sum is σ = 213532458. Its totient is φ = 213532456.

The previous prime is 213532441. The next prime is 213532471. The reversal of 213532457 is 754235312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140754496 + 72777961 = 11864^2 + 8531^2 .

It is a cyclic number.

It is not a de Polignac number, because 213532457 - 2⁴ = 213532441 is a prime.

It is a super-2 number, since 2×213532457² = 91192220384913698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213532057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106766228 + 106766229.

It is an arithmetic number, because the mean of its divisors is an integer number (106766229).

Almost surely, 2^213532457 is an apocalyptic number.

It is an amenable number.

213532457 is a deficient number, since it is larger than the sum of its proper divisors (1).

213532457 is an equidigital number, since it uses as much as digits as its factorization.

213532457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 32.

The square root of 213532457 is about 14612.7498096696. The cubic root of 213532457 is about 597.7064820931.

Adding to 213532457 its reverse (754235312), we get a palindrome (967767769).

The spelling of 213532457 in words is "two hundred thirteen million, five hundred thirty-two thousand, four hundred fifty-seven".