211511010540 has 48 divisors (see below), whose sum is σ = 592327346688. Its totient is φ = 56393744064.

The previous prime is 211511010527. The next prime is 211511010547. The reversal of 211511010540 is 45010115112.

It is not an unprimeable number, because it can be changed into a prime (211511010547) 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, 88029 + ... + 656331.

It is an arithmetic number, because the mean of its divisors is an integer number (12340153056).

Almost surely, 2^211511010540 is an apocalyptic number.

211511010540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211511010540 is an abundant number, since it is smaller than the sum of its proper divisors (380816336148).

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

211511010540 is a wasteful number, since it uses less digits than its factorization.

211511010540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574518 (or 574516 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 211511010540 its reverse (45010115112), we get a palindrome (256521125652).

The spelling of 211511010540 in words is "two hundred eleven billion, five hundred eleven million, ten thousand, five hundred forty".