213998507 has 4 divisors (see below), whose sum is σ = 214240656. Its totient is φ = 213756360.

The previous prime is 213998489. The next prime is 213998579. The reversal of 213998507 is 705899312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213998507 - 2²⁴ = 197221291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213991507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119744 + ... + 121517.

It is an arithmetic number, because the mean of its divisors is an integer number (53560164).

Almost surely, 2^213998507 is an apocalyptic number.

213998507 is a deficient number, since it is larger than the sum of its proper divisors (242149).

213998507 is an equidigital number, since it uses as much as digits as its factorization.

213998507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242148.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 213998507 is about 14628.6878085493. The cubic root of 213998507 is about 598.1410119617.

The spelling of 213998507 in words is "two hundred thirteen million, nine hundred ninety-eight thousand, five hundred seven".