213455125 has 16 divisors (see below), whose sum is σ = 286885872. Its totient is φ = 157627200.

The previous prime is 213455113. The next prime is 213455129. The reversal of 213455125 is 521554312.

It can be written as a sum of positive squares in 8 ways, for example, as 137381841 + 76073284 = 11721^2 + 8722^2 .

It is not a de Polignac number, because 213455125 - 2⁵ = 213455093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213455093 and 213455102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213455129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64054 + ... + 67303.

It is an arithmetic number, because the mean of its divisors is an integer number (17930367).

Almost surely, 2^213455125 is an apocalyptic number.

213455125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213455125 is a deficient number, since it is larger than the sum of its proper divisors (73430747).

213455125 is a wasteful number, since it uses less digits than its factorization.

213455125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131385 (or 131375 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 213455125 is about 14610.1035246161. The cubic root of 213455125 is about 597.6343191078.

The spelling of 213455125 in words is "two hundred thirteen million, four hundred fifty-five thousand, one hundred twenty-five".