213156907 has 2 divisors, whose sum is σ = 213156908. Its totient is φ = 213156906.

The previous prime is 213156883. The next prime is 213156919. The reversal of 213156907 is 709651312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213156907 - 2¹⁹ = 212632619 is a prime.

It is equal to p_11766238 and since 213156907 and 11766238 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (213156707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106578453 + 106578454.

It is an arithmetic number, because the mean of its divisors is an integer number (106578454).

Almost surely, 2^213156907 is an apocalyptic number.

213156907 is a deficient number, since it is larger than the sum of its proper divisors (1).

213156907 is an equidigital number, since it uses as much as digits as its factorization.

213156907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 213156907 is about 14599.8940749582. The cubic root of 213156907 is about 597.3558712368.

The spelling of 213156907 in words is "two hundred thirteen million, one hundred fifty-six thousand, nine hundred seven".