213311398 has 4 divisors (see below), whose sum is σ = 319967100. Its totient is φ = 106655698.

The previous prime is 213311389. The next prime is 213311419. The reversal of 213311398 is 893113312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53327848 + ... + 53327851.

It is an arithmetic number, because the mean of its divisors is an integer number (79991775).

Almost surely, 2^213311398 is an apocalyptic number.

213311398 is a deficient number, since it is larger than the sum of its proper divisors (106655702).

213311398 is a wasteful number, since it uses less digits than its factorization.

213311398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106655701.

The product of its digits is 3888, while the sum is 31.

The square root of 213311398 is about 14605.1839426965. The cubic root of 213311398 is about 597.5001527751.

It can be divided in two parts, 2133 and 11398, that added together give a palindrome (13531).

The spelling of 213311398 in words is "two hundred thirteen million, three hundred eleven thousand, three hundred ninety-eight".