211240999957 has 8 divisors (see below), whose sum is σ = 227894383584. Its totient is φ = 194645341488.

The previous prime is 211240999913. The next prime is 211240999961. The reversal of 211240999957 is 759999042112.

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

It is a de Polignac number, because none of the positive numbers 2^k-211240999957 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 (211240999997) 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, 14423683 + ... + 14438320.

It is an arithmetic number, because the mean of its divisors is an integer number (28486797948).

Almost surely, 2^211240999957 is an apocalyptic number.

It is an amenable number.

211240999957 is a deficient number, since it is larger than the sum of its proper divisors (16653383627).

211240999957 is a wasteful number, since it uses less digits than its factorization.

211240999957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28862579.

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 211240999957 in words is "two hundred eleven billion, two hundred forty million, nine hundred ninety-nine thousand, nine hundred fifty-seven".