2011213431 has 12 divisors (see below), whose sum is σ = 2907374080. Its totient is φ = 1339752960.

The previous prime is 2011213427. The next prime is 2011213447. The reversal of 2011213431 is 1343121102.

2011213431 is a `hidden beast` number, since 20 + 1 + 1 + 213 + 431 = 666.

It is not a de Polignac number, because 2011213431 - 2² = 2011213427 is a prime.

It is a super-2 number, since 2×2011213431² = 8089958930069583522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011213411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75850 + ... + 98871.

Almost surely, 2^2011213431 is an apocalyptic number.

2011213431 is a deficient number, since it is larger than the sum of its proper divisors (896160649).

2011213431 is a wasteful number, since it uses less digits than its factorization.

2011213431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176006 (or 176003 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2011213431 is about 44846.5542823526. The cubic root of 2011213431 is about 1262.2713358505.

Adding to 2011213431 its reverse (1343121102), we get a palindrome (3354334533).

The spelling of 2011213431 in words is "two billion, eleven million, two hundred thirteen thousand, four hundred thirty-one".