213612497 has 16 divisors (see below), whose sum is σ = 272096640. Its totient is φ = 163254528.

The previous prime is 213612493. The next prime is 213612499. The reversal of 213612497 is 794216312.

It is a cyclic number.

It is not a de Polignac number, because 213612497 - 2² = 213612493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213612493) 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, 44978 + ... + 49499.

It is an arithmetic number, because the mean of its divisors is an integer number (17006040).

Almost surely, 2^213612497 is an apocalyptic number.

It is an amenable number.

213612497 is a deficient number, since it is larger than the sum of its proper divisors (58484143).

213612497 is a wasteful number, since it uses less digits than its factorization.

213612497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94520.

The product of its digits is 18144, while the sum is 35.

The square root of 213612497 is about 14615.4882573248. The cubic root of 213612497 is about 597.7811537242.

The spelling of 213612497 in words is "two hundred thirteen million, six hundred twelve thousand, four hundred ninety-seven".