2151754994 has 8 divisors (see below), whose sum is σ = 3230546220. Its totient is φ = 1074906256.

The previous prime is 2151754973. The next prime is 2151754999. The reversal of 2151754994 is 4994571512.

It can be written as a sum of positive squares in 2 ways, for example, as 2151753769 + 1225 = 46387^2 + 35^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151754999) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 482849 + ... + 487284.

Almost surely, 2^2151754994 is an apocalyptic number.

2151754994 is a deficient number, since it is larger than the sum of its proper divisors (1078791226).

2151754994 is a wasteful number, since it uses less digits than its factorization.

2151754994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971244.

The product of its digits is 453600, while the sum is 47.

The square root of 2151754994 is about 46387.0132041286. The cubic root of 2151754994 is about 1291.0139643289.

The spelling of 2151754994 in words is "two billion, one hundred fifty-one million, seven hundred fifty-four thousand, nine hundred ninety-four".