2123400455 has 16 divisors (see below), whose sum is σ = 2847525408. Its totient is φ = 1506624000.

The previous prime is 2123400379. The next prime is 2123400469. The reversal of 2123400455 is 5540043212.

It is a happy number.

It is not a de Polignac number, because 2123400455 - 2⁸ = 2123400199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468566 + ... + 473075.

It is an arithmetic number, because the mean of its divisors is an integer number (177970338).

Almost surely, 2^2123400455 is an apocalyptic number.

2123400455 is a deficient number, since it is larger than the sum of its proper divisors (724124953).

2123400455 is a wasteful number, since it uses less digits than its factorization.

2123400455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941698.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2123400455 is about 46080.3695189177. The cubic root of 2123400455 is about 1285.3181354858.

Adding to 2123400455 its reverse (5540043212), we get a palindrome (7663443667).

The spelling of 2123400455 in words is "two billion, one hundred twenty-three million, four hundred thousand, four hundred fifty-five".