213125131 has 2 divisors, whose sum is σ = 213125132. Its totient is φ = 213125130.

The previous prime is 213125117. The next prime is 213125189. The reversal of 213125131 is 131521312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213125131 is a prime.

It is a super-2 number, since 2×213125131² = 90844642927534322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213125099 and 213125108.

It is not a weakly prime, because it can be changed into another prime (213125111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106562565 + 106562566.

It is an arithmetic number, because the mean of its divisors is an integer number (106562566).

Almost surely, 2^213125131 is an apocalyptic number.

213125131 is a deficient number, since it is larger than the sum of its proper divisors (1).

213125131 is an equidigital number, since it uses as much as digits as its factorization.

213125131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 213125131 is about 14598.8058073255. The cubic root of 213125131 is about 597.3261864947.

Adding to 213125131 its reverse (131521312), we get a palindrome (344646443).

The spelling of 213125131 in words is "two hundred thirteen million, one hundred twenty-five thousand, one hundred thirty-one".