213510131 has 2 divisors, whose sum is σ = 213510132. Its totient is φ = 213510130.

The previous prime is 213510119. The next prime is 213510137. The reversal of 213510131 is 131015312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213510131 is a prime.

It is a super-2 number, since 2×213510131² = 91173152079274322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213510137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106755065 + 106755066.

It is an arithmetic number, because the mean of its divisors is an integer number (106755066).

Almost surely, 2^213510131 is an apocalyptic number.

213510131 is a deficient number, since it is larger than the sum of its proper divisors (1).

213510131 is an equidigital number, since it uses as much as digits as its factorization.

213510131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 213510131 is about 14611.9858677731. The cubic root of 213510131 is about 597.6856501936.

Adding to 213510131 its reverse (131015312), we get a palindrome (344525443).

The spelling of 213510131 in words is "two hundred thirteen million, five hundred ten thousand, one hundred thirty-one".