540575981 has 8 divisors (see below), whose sum is σ = 590104224. Its totient is φ = 491111920.

The previous prime is 540575977. The next prime is 540575989. The reversal of 540575981 is 189575045.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 540575981 - 2² = 540575977 is a prime.

It is a super-2 number, since 2×540575981² = 584444782468224722, which 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 (540575989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2510 + ... + 32976.

It is an arithmetic number, because the mean of its divisors is an integer number (73763028).

Almost surely, 2^540575981 is an apocalyptic number.

It is an amenable number.

540575981 is a deficient number, since it is larger than the sum of its proper divisors (49528243).

540575981 is a wasteful number, since it uses less digits than its factorization.

540575981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32091.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 540575981 is about 23250.2899121710. The cubic root of 540575981 is about 814.6147104278.

The spelling of 540575981 in words is "five hundred forty million, five hundred seventy-five thousand, nine hundred eighty-one".