2123001455 has 4 divisors (see below), whose sum is σ = 2547601752. Its totient is φ = 1698401160.

The previous prime is 2123001449. The next prime is 2123001479. The reversal of 2123001455 is 5541003212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2123001455 - 2¹⁴ = 2122985071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123001455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212300141 + ... + 212300150.

It is an arithmetic number, because the mean of its divisors is an integer number (636900438).

Almost surely, 2^2123001455 is an apocalyptic number.

2123001455 is a deficient number, since it is larger than the sum of its proper divisors (424600297).

2123001455 is an equidigital number, since it uses as much as digits as its factorization.

2123001455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424600296.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2123001455 is about 46076.0399231531. The cubic root of 2123001455 is about 1285.2376240495.

Adding to 2123001455 its reverse (5541003212), we get a palindrome (7664004667).

The spelling of 2123001455 in words is "two billion, one hundred twenty-three million, one thousand, four hundred fifty-five".