531151442 has 4 divisors (see below), whose sum is σ = 796727166. Its totient is φ = 265575720.

The previous prime is 531151399. The next prime is 531151447. The reversal of 531151442 is 244151135.

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., 515698681 + 15452761 = 22709^2 + 3931^2 .

It is not an unprimeable number, because it can be changed into a prime (531151447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132787859 + ... + 132787862.

Almost surely, 2^531151442 is an apocalyptic number.

531151442 is a deficient number, since it is larger than the sum of its proper divisors (265575724).

531151442 is a wasteful number, since it uses less digits than its factorization.

531151442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265575723.

The product of its digits is 2400, while the sum is 26.

The square root of 531151442 is about 23046.7230208548. The cubic root of 531151442 is about 809.8528625693.

The spelling of 531151442 in words is "five hundred thirty-one million, one hundred fifty-one thousand, four hundred forty-two".