540817551 has 6 divisors (see below), whose sum is σ = 781180920. Its totient is φ = 360545028.

The previous prime is 540817547. The next prime is 540817573. The reversal of 540817551 is 155718045.

It is not a de Polignac number, because 540817551 - 2² = 540817547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540817531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30045411 + ... + 30045428.

It is an arithmetic number, because the mean of its divisors is an integer number (130196820).

Almost surely, 2^540817551 is an apocalyptic number.

540817551 is a deficient number, since it is larger than the sum of its proper divisors (240363369).

540817551 is a wasteful number, since it uses less digits than its factorization.

540817551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60090845 (or 60090842 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 36.

The square root of 540817551 is about 23255.4843209080. The cubic root of 540817551 is about 814.7360360612.

The spelling of 540817551 in words is "five hundred forty million, eight hundred seventeen thousand, five hundred fifty-one".