211480831 has 2 divisors, whose sum is σ = 211480832. Its totient is φ = 211480830.

The previous prime is 211480793. The next prime is 211480859. The reversal of 211480831 is 138084112.

It is an a-pointer prime, because the next prime (211480859) can be obtained adding 211480831 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211480831 - 2¹¹ = 211478783 is a prime.

It is a super-2 number, since 2×211480831² = 89448283760901122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211480831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211480861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105740415 + 105740416.

It is an arithmetic number, because the mean of its divisors is an integer number (105740416).

Almost surely, 2^211480831 is an apocalyptic number.

211480831 is a deficient number, since it is larger than the sum of its proper divisors (1).

211480831 is an equidigital number, since it uses as much as digits as its factorization.

211480831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 211480831 is about 14542.3805135198. The cubic root of 211480831 is about 595.7860580332.

The spelling of 211480831 in words is "two hundred eleven million, four hundred eighty thousand, eight hundred thirty-one".