213913975 has 24 divisors (see below), whose sum is σ = 306395568. Its totient is φ = 146419200.

The previous prime is 213913969. The next prime is 213913979. The reversal of 213913975 is 579319312.

It is not a de Polignac number, because 213913975 - 2⁹ = 213913463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213913979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18204 + ... + 27553.

It is an arithmetic number, because the mean of its divisors is an integer number (12766482).

Almost surely, 2^213913975 is an apocalyptic number.

213913975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

213913975 is a deficient number, since it is larger than the sum of its proper divisors (92481593).

213913975 is a wasteful number, since it uses less digits than its factorization.

213913975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45795 (or 45790 counting only the distinct ones).

The product of its digits is 51030, while the sum is 40.

The square root of 213913975 is about 14625.7982688125. The cubic root of 213913975 is about 598.0622439433.

The spelling of 213913975 in words is "two hundred thirteen million, nine hundred thirteen thousand, nine hundred seventy-five".