531669642 has 16 divisors (see below), whose sum is σ = 1215244992. Its totient is φ = 151905600.

The previous prime is 531669637. The next prime is 531669689. The reversal of 531669642 is 246966135.

It is a super-3 number, since 3×531669642³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 12658801 = 531669642 / (5 + 3 + 1 + 6 + 6 + 9 + 6 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 531669594 and 531669603.

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, 6329359 + ... + 6329442.

It is an arithmetic number, because the mean of its divisors is an integer number (75952812).

Almost surely, 2^531669642 is an apocalyptic number.

531669642 is an abundant number, since it is smaller than the sum of its proper divisors (683575350).

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

531669642 is a wasteful number, since it uses less digits than its factorization.

531669642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12658813.

The product of its digits is 233280, while the sum is 42.

The square root of 531669642 is about 23057.9626593505. The cubic root of 531669642 is about 810.1161455156.

The spelling of 531669642 in words is "five hundred thirty-one million, six hundred sixty-nine thousand, six hundred forty-two".