2091551450 has 24 divisors (see below), whose sum is σ = 3985174620. Its totient is φ = 816214400.

The previous prime is 2091551417. The next prime is 2091551467. The reversal of 2091551450 is 541551902.

It can be written as a sum of positive squares in 6 ways, for example, as 953636161 + 1137915289 = 30881^2 + 33733^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508085 + ... + 512184.

Almost surely, 2^2091551450 is an apocalyptic number.

2091551450 is a deficient number, since it is larger than the sum of its proper divisors (1893623170).

2091551450 is a wasteful number, since it uses less digits than its factorization.

2091551450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020322 (or 1020317 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 2091551450 is about 45733.4828107373. The cubic root of 2091551450 is about 1278.8595493720.

The spelling of 2091551450 in words is "two billion, ninety-one million, five hundred fifty-one thousand, four hundred fifty".