2153544499 has 4 divisors (see below), whose sum is σ = 2154353440. Its totient is φ = 2152735560.

The previous prime is 2153544473. The next prime is 2153544517. The reversal of 2153544499 is 9944453512.

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

It is a cyclic number.

It is not a de Polignac number, because 2153544499 - 2¹¹ = 2153542451 is a prime.

It is a super-2 number, since 2×2153544499² = 9275507818346322002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153544409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400464 + ... + 405805.

It is an arithmetic number, because the mean of its divisors is an integer number (538588360).

Almost surely, 2^2153544499 is an apocalyptic number.

2153544499 is a deficient number, since it is larger than the sum of its proper divisors (808941).

2153544499 is an equidigital number, since it uses as much as digits as its factorization.

2153544499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808940.

The product of its digits is 777600, while the sum is 46.

The square root of 2153544499 is about 46406.2980531738. The cubic root of 2153544499 is about 1291.3717553413.

The spelling of 2153544499 in words is "two billion, one hundred fifty-three million, five hundred forty-four thousand, four hundred ninety-nine".