2154512324431 has 4 divisors (see below), whose sum is σ = 2189832198664. Its totient is φ = 2119192450200.

The previous prime is 2154512324417. The next prime is 2154512324521. The reversal of 2154512324431 is 1344232154512.

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 2154512324431 - 2¹¹ = 2154512322383 is a prime.

It is a super-2 number, since 2×2154512324431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154512324231) 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, 17659937025 + ... + 17659937146.

It is an arithmetic number, because the mean of its divisors is an integer number (547458049666).

Almost surely, 2^{2154512324431} is an apocalyptic number.

2154512324431 is a deficient number, since it is larger than the sum of its proper divisors (35319874233).

2154512324431 is an equidigital number, since it uses as much as digits as its factorization.

2154512324431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35319874232.

The product of its digits is 115200, while the sum is 37.

Adding to 2154512324431 its reverse (1344232154512), we get a palindrome (3498744478943).

The spelling of 2154512324431 in words is "two trillion, one hundred fifty-four billion, five hundred twelve million, three hundred twenty-four thousand, four hundred thirty-one".