213097406 has 4 divisors (see below), whose sum is σ = 319646112. Its totient is φ = 106548702.

The previous prime is 213097403. The next prime is 213097411. The reversal of 213097406 is 604790312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213097403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53274350 + ... + 53274353.

It is an arithmetic number, because the mean of its divisors is an integer number (79911528).

Almost surely, 2^213097406 is an apocalyptic number.

213097406 is a deficient number, since it is larger than the sum of its proper divisors (106548706).

213097406 is a wasteful number, since it uses less digits than its factorization.

213097406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106548705.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 213097406 is about 14597.8562124717. The cubic root of 213097406 is about 597.3002837357.

The spelling of 213097406 in words is "two hundred thirteen million, ninety-seven thousand, four hundred six".