531142000 has 40 divisors (see below), whose sum is σ = 1284306192. Its totient is φ = 212456000.

The previous prime is 531141953. The next prime is 531142019. The reversal of 531142000 is 241135.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×531142000² = 564223648328000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 130786 + ... + 134785.

Almost surely, 2^531142000 is an apocalyptic number.

531142000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

531142000 is an abundant number, since it is smaller than the sum of its proper divisors (753164192).

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

531142000 is a wasteful number, since it uses less digits than its factorization.

531142000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265594 (or 265578 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 531142000 is about 23046.5181752038. The cubic root of 531142000 is about 809.8480637646.

Adding to 531142000 its reverse (241135), we get a palindrome (531383135).

The spelling of 531142000 in words is "five hundred thirty-one million, one hundred forty-two thousand".