2154401015 has 12 divisors (see below), whose sum is σ = 2799447624. Its totient is φ = 1590941664.

The previous prime is 2154400999. The next prime is 2154401027. The reversal of 2154401015 is 5101044512.

It is not a de Polignac number, because 2154401015 - 2⁴ = 2154400999 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1273949 + ... + 1275638.

It is an arithmetic number, because the mean of its divisors is an integer number (233287302).

Almost surely, 2^2154401015 is an apocalyptic number.

2154401015 is a deficient number, since it is larger than the sum of its proper divisors (645046609).

2154401015 is a wasteful number, since it uses less digits than its factorization.

2154401015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549618 (or 2549605 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2154401015 is about 46415.5255814259. The cubic root of 2154401015 is about 1291.5429357627.

Adding to 2154401015 its reverse (5101044512), we get a palindrome (7255445527).

The spelling of 2154401015 in words is "two billion, one hundred fifty-four million, four hundred one thousand, fifteen".