2291155890 has 32 divisors (see below), whose sum is σ = 5504875776. Its totient is φ = 610296960.

The previous prime is 2291155883. The next prime is 2291155957. The reversal of 2291155890 is 985511922.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14587 + ... + 69246.

It is an arithmetic number, because the mean of its divisors is an integer number (172027368).

Almost surely, 2^2291155890 is an apocalyptic number.

2291155890 is an abundant number, since it is smaller than the sum of its proper divisors (3213719886).

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

2291155890 is a wasteful number, since it uses less digits than its factorization.

2291155890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84754.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 2291155890 is about 47866.0202022270. The cubic root of 2291155890 is about 1318.3120239761.

The spelling of 2291155890 in words is "two billion, two hundred ninety-one million, one hundred fifty-five thousand, eight hundred ninety".