211248137 has 8 divisors (see below), whose sum is σ = 235447200. Its totient is φ = 188357184.

The previous prime is 211248083. The next prime is 211248139. The reversal of 211248137 is 731842112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211248137 - 2¹² = 211244041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211248139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326687 + ... + 327332.

It is an arithmetic number, because the mean of its divisors is an integer number (29430900).

Almost surely, 2^211248137 is an apocalyptic number.

It is an amenable number.

211248137 is a deficient number, since it is larger than the sum of its proper divisors (24199063).

211248137 is a wasteful number, since it uses less digits than its factorization.

211248137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654055.

The product of its digits is 2688, while the sum is 29.

The square root of 211248137 is about 14534.3777644590. The cubic root of 211248137 is about 595.5674618310.

The spelling of 211248137 in words is "two hundred eleven million, two hundred forty-eight thousand, one hundred thirty-seven".