531138258 has 48 divisors (see below), whose sum is σ = 1343197440. Its totient is φ = 148523328.

The previous prime is 531138253. The next prime is 531138299. The reversal of 531138258 is 852831135.

It is a super-2 number, since 2×531138258² = 564215698222549128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531138253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38923 + ... + 50766.

It is an arithmetic number, because the mean of its divisors is an integer number (27983280).

Almost surely, 2^531138258 is an apocalyptic number.

531138258 is an abundant number, since it is smaller than the sum of its proper divisors (812059182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531138258 is a wasteful number, since it uses less digits than its factorization.

531138258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89751 (or 89748 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 531138258 is about 23046.4369914310. The cubic root of 531138258 is about 809.8461619138.

It can be divided in two parts, 53 and 1138258, that added together give a palindrome (1138311).

The spelling of 531138258 in words is "five hundred thirty-one million, one hundred thirty-eight thousand, two hundred fifty-eight".