213968925 has 24 divisors (see below), whose sum is σ = 393070080. Its totient is φ = 114116400.

The previous prime is 213968921. The next prime is 213968939. The reversal of 213968925 is 529869312.

It is not a de Polignac number, because 213968925 - 2² = 213968921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213968921) 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, 157821 + ... + 159170.

It is an arithmetic number, because the mean of its divisors is an integer number (16377920).

Almost surely, 2^213968925 is an apocalyptic number.

213968925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213968925 is a deficient number, since it is larger than the sum of its proper divisors (179101155).

213968925 is a wasteful number, since it uses less digits than its factorization.

213968925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317010 (or 316999 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 213968925 is about 14627.6766781331. The cubic root of 213968925 is about 598.1134494286.

The spelling of 213968925 in words is "two hundred thirteen million, nine hundred sixty-eight thousand, nine hundred twenty-five".