211631605140 has 48 divisors (see below), whose sum is σ = 595178966592. Its totient is φ = 56186478336.

The previous prime is 211631605139. The next prime is 211631605177. The reversal of 211631605140 is 41506136112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 211631605098 and 211631605107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7755529 + ... + 7782768.

It is an arithmetic number, because the mean of its divisors is an integer number (12399561804).

Almost surely, 2^211631605140 is an apocalyptic number.

211631605140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211631605140 is an abundant number, since it is smaller than the sum of its proper divisors (383547361452).

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

211631605140 is a wasteful number, since it uses less digits than its factorization.

211631605140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15538536 (or 15538534 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 211631605140 in words is "two hundred eleven billion, six hundred thirty-one million, six hundred five thousand, one hundred forty".