213651373 has 4 divisors (see below), whose sum is σ = 230086108. Its totient is φ = 197216640.

The previous prime is 213651281. The next prime is 213651401. The reversal of 213651373 is 373156312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82846404 + 130804969 = 9102^2 + 11437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213651373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213651173) 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, 8217348 + ... + 8217373.

It is an arithmetic number, because the mean of its divisors is an integer number (57521527).

Almost surely, 2^213651373 is an apocalyptic number.

It is an amenable number.

213651373 is a deficient number, since it is larger than the sum of its proper divisors (16434735).

213651373 is a wasteful number, since it uses less digits than its factorization.

213651373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16434734.

The product of its digits is 11340, while the sum is 31.

The square root of 213651373 is about 14616.8181558094. The cubic root of 213651373 is about 597.8174155391.

The spelling of 213651373 in words is "two hundred thirteen million, six hundred fifty-one thousand, three hundred seventy-three".