2154144005015 has 16 divisors (see below), whose sum is σ = 2607789975840. Its totient is φ = 1708143951360.

The previous prime is 2154144004981. The next prime is 2154144005017. The reversal of 2154144005015 is 5105004414512.

It is a happy number.

It is not a de Polignac number, because 2154144005015 - 2¹² = 2154144000919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154144005017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2082926 + ... + 2940555.

It is an arithmetic number, because the mean of its divisors is an integer number (162986873490).

Almost surely, 2^{2154144005015} is an apocalyptic number.

2154144005015 is a deficient number, since it is larger than the sum of its proper divisors (453645970825).

2154144005015 is a wasteful number, since it uses less digits than its factorization.

2154144005015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024242.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 2154144005015 its reverse (5105004414512), we get a palindrome (7259148419527).

The spelling of 2154144005015 in words is "two trillion, one hundred fifty-four billion, one hundred forty-four million, five thousand, fifteen".