213857345 has 16 divisors (see below), whose sum is σ = 279874560. Its totient is φ = 155922624.

The previous prime is 213857341. The next prime is 213857363. The reversal of 213857345 is 543758312.

213857345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213857345 - 2² = 213857341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213857299 and 213857308.

It is not an unprimeable number, because it can be changed into a prime (213857341) 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, 15689 + ... + 25958.

It is an arithmetic number, because the mean of its divisors is an integer number (17492160).

Almost surely, 2^213857345 is an apocalyptic number.

It is an amenable number.

213857345 is a deficient number, since it is larger than the sum of its proper divisors (66017215).

213857345 is a wasteful number, since it uses less digits than its factorization.

213857345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41744.

The product of its digits is 100800, while the sum is 38.

The square root of 213857345 is about 14623.8621779611. The cubic root of 213857345 is about 598.0094637638.

The spelling of 213857345 in words is "two hundred thirteen million, eight hundred fifty-seven thousand, three hundred forty-five".