213122115 has 24 divisors (see below), whose sum is σ = 391143168. Its totient is φ = 106978560.

The previous prime is 213122099. The next prime is 213122137. The reversal of 213122115 is 511221312.

It is not a de Polignac number, because 213122115 - 2⁴ = 213122099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138531 + ... + 140060.

It is an arithmetic number, because the mean of its divisors is an integer number (16297632).

Almost surely, 2^213122115 is an apocalyptic number.

213122115 is a deficient number, since it is larger than the sum of its proper divisors (178021053).

213122115 is a wasteful number, since it uses less digits than its factorization.

213122115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278619 (or 278616 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 213122115 is about 14598.7025108398. The cubic root of 213122115 is about 597.3233688318.

Adding to 213122115 its reverse (511221312), we get a palindrome (724343427).

The spelling of 213122115 in words is "two hundred thirteen million, one hundred twenty-two thousand, one hundred fifteen".