531421442 has 4 divisors (see below), whose sum is σ = 797132166. Its totient is φ = 265710720.

The previous prime is 531421427. The next prime is 531421489. The reversal of 531421442 is 244124135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 468679201 + 62742241 = 21649^2 + 7921^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132855359 + ... + 132855362.

Almost surely, 2^531421442 is an apocalyptic number.

531421442 is a deficient number, since it is larger than the sum of its proper divisors (265710724).

531421442 is a wasteful number, since it uses less digits than its factorization.

531421442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265710723.

The product of its digits is 3840, while the sum is 26.

The square root of 531421442 is about 23052.5799423839. The cubic root of 531421442 is about 809.9900633847.

Adding to 531421442 its reverse (244124135), we get a palindrome (775545577).

The spelling of 531421442 in words is "five hundred thirty-one million, four hundred twenty-one thousand, four hundred forty-two".