2115440554 has 8 divisors (see below), whose sum is σ = 3282580260. Its totient is φ = 1021247136.

The previous prime is 2115440549. The next prime is 2115440557. The reversal of 2115440554 is 4550445112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2097182025 + 18258529 = 45795^2 + 4273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2115440557) 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, 18236499 + ... + 18236614.

Almost surely, 2^2115440554 is an apocalyptic number.

2115440554 is a deficient number, since it is larger than the sum of its proper divisors (1167139706).

2115440554 is a wasteful number, since it uses less digits than its factorization.

2115440554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36473144.

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 2115440554 is about 45993.9186632320. The cubic root of 2115440554 is about 1283.7100519428.

Adding to 2115440554 its reverse (4550445112), we get a palindrome (6665885666).

The spelling of 2115440554 in words is "two billion, one hundred fifteen million, four hundred forty thousand, five hundred fifty-four".