538531556 has 24 divisors (see below), whose sum is σ = 977072544. Its totient is φ = 259526720.

The previous prime is 538531547. The next prime is 538531589. The reversal of 538531556 is 655135835.

It is a happy number.

It is a super-2 number, since 2×538531556² = 580032473615562272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6170 + ... + 33393.

It is an arithmetic number, because the mean of its divisors is an integer number (40711356).

Almost surely, 2^538531556 is an apocalyptic number.

It is an amenable number.

538531556 is a deficient number, since it is larger than the sum of its proper divisors (438540988).

538531556 is a wasteful number, since it uses less digits than its factorization.

538531556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39691 (or 39689 counting only the distinct ones).

The product of its digits is 270000, while the sum is 41.

The square root of 538531556 is about 23206.2826837906. The cubic root of 538531556 is about 813.5864722375.

The spelling of 538531556 in words is "five hundred thirty-eight million, five hundred thirty-one thousand, five hundred fifty-six".