213152531 has 2 divisors, whose sum is σ = 213152532. Its totient is φ = 213152530.

The previous prime is 213152509. The next prime is 213152557. The reversal of 213152531 is 135251312.

It is a happy number.

213152531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213152531 is a prime.

It is a super-2 number, since 2×213152531² = 90868002943411922, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_11766011 and since 213152531 and 11766011 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 213152497 and 213152506.

It is not a weakly prime, because it can be changed into another prime (213152501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106576265 + 106576266.

It is an arithmetic number, because the mean of its divisors is an integer number (106576266).

Almost surely, 2^213152531 is an apocalyptic number.

213152531 is a deficient number, since it is larger than the sum of its proper divisors (1).

213152531 is an equidigital number, since it uses as much as digits as its factorization.

213152531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 213152531 is about 14599.7442100881. The cubic root of 213152531 is about 597.3517834075.

The spelling of 213152531 in words is "two hundred thirteen million, one hundred fifty-two thousand, five hundred thirty-one".