2211490831 has 4 divisors (see below), whose sum is σ = 2412535464. Its totient is φ = 2010446200.

The previous prime is 2211490823. The next prime is 2211490847. The reversal of 2211490831 is 1380941122.

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 2211490831 - 2³ = 2211490823 is a prime.

It is a super-2 number, since 2×2211490831² = 9781383391194141122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211490793 and 2211490802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211490811) 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, 100522300 + ... + 100522321.

It is an arithmetic number, because the mean of its divisors is an integer number (603133866).

Almost surely, 2^2211490831 is an apocalyptic number.

2211490831 is a deficient number, since it is larger than the sum of its proper divisors (201044633).

2211490831 is a wasteful number, since it uses less digits than its factorization.

2211490831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201044632.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2211490831 is about 47026.4907366050. The cubic root of 2211490831 is about 1302.8518911245.

The spelling of 2211490831 in words is "two billion, two hundred eleven million, four hundred ninety thousand, eight hundred thirty-one".