54131140921 has 27 divisors (see below), whose sum is σ = 64468096623. Its totient is φ = 45396814320.

The previous prime is 54131140901. The next prime is 54131140939. The reversal of 54131140921 is 12904113145.

The square root of 54131140921 is 232661.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8007565225 + 46123575696 = 89485^2 + 214764^2 .

It is not a de Polignac number, because 54131140921 - 2¹³ = 54131132729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54131140901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33269710 + ... + 33271336.

Almost surely, 2^54131140921 is an apocalyptic number.

54131140921 is the 232661-st square number.

54131140921 is the 116331-st centered octagonal number.

It is an amenable number.

54131140921 is a deficient number, since it is larger than the sum of its proper divisors (10336955702).

54131140921 is an equidigital number, since it uses as much as digits as its factorization.

54131140921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3302 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 54131140921 in words is "fifty-four billion, one hundred thirty-one million, one hundred forty thousand, nine hundred twenty-one".