540001531 has 2 divisors, whose sum is σ = 540001532. Its totient is φ = 540001530.

The previous prime is 540001523. The next prime is 540001543. The reversal of 540001531 is 135100045.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 540001531 - 2³ = 540001523 is a prime.

It is a super-2 number, since 2×540001531² = 583203306964687922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 540001499 and 540001508.

It is not a weakly prime, because it can be changed into another prime (540041531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270000765 + 270000766.

It is an arithmetic number, because the mean of its divisors is an integer number (270000766).

Almost surely, 2^540001531 is an apocalyptic number.

540001531 is a deficient number, since it is larger than the sum of its proper divisors (1).

540001531 is an equidigital number, since it uses as much as digits as its factorization.

540001531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 540001531 is about 23237.9330190962. The cubic root of 540001531 is about 814.3260545654.

Adding to 540001531 its reverse (135100045), we get a palindrome (675101576).

The spelling of 540001531 in words is "five hundred forty million, one thousand, five hundred thirty-one".