2154134621331 has 64 divisors (see below), whose sum is σ = 3987639936000. Its totient is φ = 1116538214400.

The previous prime is 2154134621329. The next prime is 2154134621341. The reversal of 2154134621331 is 1331264314512.

2154134621331 is a `hidden beast` number, since 2 + 1 + 54 + 13 + 462 + 133 + 1 = 666.

It is not a de Polignac number, because 2154134621331 - 2¹ = 2154134621329 is a prime.

It is a super-2 number, since 2×2154134621331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2154134621341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 220360 + ... + 2087301.

It is an arithmetic number, because the mean of its divisors is an integer number (62306874000).

Almost surely, 2^{2154134621331} is an apocalyptic number.

2154134621331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2154134621331 is a deficient number, since it is larger than the sum of its proper divisors (1833505314669).

2154134621331 is a wasteful number, since it uses less digits than its factorization.

2154134621331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308137 (or 2308131 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 2154134621331 its reverse (1331264314512), we get a palindrome (3485398935843).

The spelling of 2154134621331 in words is "two trillion, one hundred fifty-four billion, one hundred thirty-four million, six hundred twenty-one thousand, three hundred thirty-one".