2154243455 has 64 divisors (see below), whose sum is σ = 3290327040. Its totient is φ = 1317689856.

The previous prime is 2154243407. The next prime is 2154243461. The reversal of 2154243455 is 5543424512.

2154243455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2154243455 - 2¹² = 2154239359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2014661 + ... + 2015729.

It is an arithmetic number, because the mean of its divisors is an integer number (51411360).

Almost surely, 2^2154243455 is an apocalyptic number.

2154243455 is a deficient number, since it is larger than the sum of its proper divisors (1136083585).

2154243455 is a wasteful number, since it uses less digits than its factorization.

2154243455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its digits is 96000, while the sum is 35.

The square root of 2154243455 is about 46413.8282734790. The cubic root of 2154243455 is about 1291.5114497542.

Adding to 2154243455 its reverse (5543424512), we get a palindrome (7697667967).

The spelling of 2154243455 in words is "two billion, one hundred fifty-four million, two hundred forty-three thousand, four hundred fifty-five".