2213948391 has 32 divisors (see below), whose sum is σ = 3121009920. Its totient is φ = 1394383104.

The previous prime is 2213948389. The next prime is 2213948411. The reversal of 2213948391 is 1938493122.

It is not a de Polignac number, because 2213948391 - 2¹ = 2213948389 is a prime.

It is a super-2 number, since 2×2213948391² = 9803134956022977762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213948371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541531 + ... + 545603.

It is an arithmetic number, because the mean of its divisors is an integer number (97531560).

Almost surely, 2^2213948391 is an apocalyptic number.

2213948391 is a deficient number, since it is larger than the sum of its proper divisors (907061529).

2213948391 is a wasteful number, since it uses less digits than its factorization.

2213948391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255.

The product of its digits is 93312, while the sum is 42.

The square root of 2213948391 is about 47052.6130092687. The cubic root of 2213948391 is about 1303.3343185360.

The spelling of 2213948391 in words is "two billion, two hundred thirteen million, nine hundred forty-eight thousand, three hundred ninety-one".