211990272407 has 4 divisors (see below), whose sum is σ = 212351414856. Its totient is φ = 211629129960.

The previous prime is 211990272353. The next prime is 211990272413. The reversal of 211990272407 is 704272099112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211990272407 - 2⁶ = 211990272343 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 (211990272427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180570344 + ... + 180571517.

It is an arithmetic number, because the mean of its divisors is an integer number (53087853714).

Almost surely, 2^211990272407 is an apocalyptic number.

211990272407 is a deficient number, since it is larger than the sum of its proper divisors (361142449).

211990272407 is an equidigital number, since it uses as much as digits as its factorization.

211990272407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361142448.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 211990272407 in words is "two hundred eleven billion, nine hundred ninety million, two hundred seventy-two thousand, four hundred seven".