211157470340 has 144 divisors (see below), whose sum is σ = 470242886400. Its totient is φ = 79632774144.

The previous prime is 211157470327. The next prime is 211157470357. The reversal of 211157470340 is 43074751112.

It is a self number, because there is not a number n which added to its sum of digits gives 211157470340.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 285733691 + ... + 285734429.

It is an arithmetic number, because the mean of its divisors is an integer number (3265575600).

Almost surely, 2^211157470340 is an apocalyptic number.

211157470340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211157470340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235121443200).

211157470340 is an abundant number, since it is smaller than the sum of its proper divisors (259085416060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211157470340 is a wasteful number, since it uses less digits than its factorization.

211157470340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1121 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 211157470340 in words is "two hundred eleven billion, one hundred fifty-seven million, four hundred seventy thousand, three hundred forty".