213251603 has 4 divisors (see below), whose sum is σ = 213452160. Its totient is φ = 213051048.

The previous prime is 213251579. The next prime is 213251617. The reversal of 213251603 is 306152312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213251603 - 2⁶ = 213251539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213251503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98675 + ... + 100812.

It is an arithmetic number, because the mean of its divisors is an integer number (53363040).

Almost surely, 2^213251603 is an apocalyptic number.

213251603 is a deficient number, since it is larger than the sum of its proper divisors (200557).

213251603 is a wasteful number, since it uses less digits than its factorization.

213251603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200556.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 213251603 is about 14603.1367520817. The cubic root of 213251603 is about 597.4443175644. Note that the first 3 decimals are identical.

It can be divided in two parts, 2132 and 51603, that added together give a palindrome (53735).

The spelling of 213251603 in words is "two hundred thirteen million, two hundred fifty-one thousand, six hundred three".