2154545451 has 24 divisors (see below), whose sum is σ = 3307749120. Its totient is φ = 1347543216.

The previous prime is 2154545441. The next prime is 2154545479. The reversal of 2154545451 is 1545454512.

2154545451 is a `hidden beast` number, since 2 + 154 + 5 + 454 + 51 = 666.

It is not a de Polignac number, because 2154545451 - 2⁶ = 2154545387 is a prime.

It is a super-2 number, since 2×2154545451² = 9284132200849586802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2154545441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43551 + ... + 78776.

It is an arithmetic number, because the mean of its divisors is an integer number (137822880).

Almost surely, 2^2154545451 is an apocalyptic number.

2154545451 is a deficient number, since it is larger than the sum of its proper divisors (1153203669).

2154545451 is a wasteful number, since it uses less digits than its factorization.

2154545451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122455 (or 122452 counting only the distinct ones).

The product of its digits is 80000, while the sum is 36.

The square root of 2154545451 is about 46417.0814571532. The cubic root of 2154545451 is about 1291.5717977876.

Adding to 2154545451 its reverse (1545454512), we get a palindrome (3699999963).

The spelling of 2154545451 in words is "two billion, one hundred fifty-four million, five hundred forty-five thousand, four hundred fifty-one".