542502531 has 6 divisors (see below), whose sum is σ = 783614780. Its totient is φ = 361668348.

The previous prime is 542502523. The next prime is 542502539. The reversal of 542502531 is 135205245.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (542502523) and next prime (542502539).

It is not a de Polignac number, because 542502531 - 2³ = 542502523 is a prime.

It is a super-2 number, since 2×542502531² = 588617992282811922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 542502495 and 542502504.

It is not an unprimeable number, because it can be changed into a prime (542502539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30139021 + ... + 30139038.

Almost surely, 2^542502531 is an apocalyptic number.

542502531 is a deficient number, since it is larger than the sum of its proper divisors (241112249).

542502531 is a wasteful number, since it uses less digits than its factorization.

542502531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60278065 (or 60278062 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 542502531 is about 23291.6837304648. The cubic root of 542502531 is about 815.5812938046.

Adding to 542502531 its reverse (135205245), we get a palindrome (677707776).

The spelling of 542502531 in words is "five hundred forty-two million, five hundred two thousand, five hundred thirty-one".