213281925 has 24 divisors (see below), whose sum is σ = 358414560. Its totient is φ = 111883200.

The previous prime is 213281917. The next prime is 213281933. The reversal of 213281925 is 529182312.

It is a happy number.

213281925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213281917) and next prime (213281933).

It is not a de Polignac number, because 213281925 - 2³ = 213281917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18735 + ... + 27884.

It is an arithmetic number, because the mean of its divisors is an integer number (14933940).

Almost surely, 2^213281925 is an apocalyptic number.

213281925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213281925 is a deficient number, since it is larger than the sum of its proper divisors (145132635).

213281925 is a wasteful number, since it uses less digits than its factorization.

213281925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46693 (or 46688 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 213281925 is about 14604.1749167832. The cubic root of 213281925 is about 597.4726328624.

The spelling of 213281925 in words is "two hundred thirteen million, two hundred eighty-one thousand, nine hundred twenty-five".