2154535015 has 4 divisors (see below), whose sum is σ = 2585442024. Its totient is φ = 1723628008.

The previous prime is 2154535003. The next prime is 2154535027. The reversal of 2154535015 is 5105354512.

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

It is an interprime number because it is at equal distance from previous prime (2154535003) and next prime (2154535027).

It is a cyclic number.

It is not a de Polignac number, because 2154535015 - 2⁵ = 2154534983 is a prime.

It is a super-2 number, since 2×2154535015² = 9284042261722100450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 215453497 + ... + 215453506.

It is an arithmetic number, because the mean of its divisors is an integer number (646360506).

Almost surely, 2^2154535015 is an apocalyptic number.

2154535015 is a deficient number, since it is larger than the sum of its proper divisors (430907009).

2154535015 is an equidigital number, since it uses as much as digits as its factorization.

2154535015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430907008.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 2154535015 is about 46416.9690415046. The cubic root of 2154535015 is about 1291.5697124498.

Adding to 2154535015 its reverse (5105354512), we get a palindrome (7259889527).

The spelling of 2154535015 in words is "two billion, one hundred fifty-four million, five hundred thirty-five thousand, fifteen".