2231071990 has 128 divisors (see below), whose sum is σ = 4983939072. Its totient is φ = 702535680.

The previous prime is 2231071963. The next prime is 2231072003. The reversal of 2231071990 is 991701322.

It is a happy number.

It is a super-3 number, since 3×2231071990³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4818499 + ... + 4818961.

It is an arithmetic number, because the mean of its divisors is an integer number (38937024).

Almost surely, 2^2231071990 is an apocalyptic number.

2231071990 is an abundant number, since it is smaller than the sum of its proper divisors (2752867082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231071990 is a wasteful number, since it uses less digits than its factorization.

2231071990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 2231071990 is about 47234.2247739920. The cubic root of 2231071990 is about 1306.6858693930.

The spelling of 2231071990 in words is "two billion, two hundred thirty-one million, seventy-one thousand, nine hundred ninety".