531402730 has 8 divisors (see below), whose sum is σ = 956524932. Its totient is φ = 212561088.

The previous prime is 531402721. The next prime is 531402733. The reversal of 531402730 is 37204135.

It can be written as a sum of positive squares in 2 ways, for example, as 502790929 + 28611801 = 22423^2 + 5349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×531402730² = 564777722902905800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531402695 and 531402704.

It is not an unprimeable number, because it can be changed into a prime (531402733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26570127 + ... + 26570146.

Almost surely, 2^531402730 is an apocalyptic number.

531402730 is a deficient number, since it is larger than the sum of its proper divisors (425122202).

531402730 is a wasteful number, since it uses less digits than its factorization.

531402730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53140280.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 531402730 is about 23052.1740840208. The cubic root of 531402730 is about 809.9805563590.

Adding to 531402730 its reverse (37204135), we get a palindrome (568606865).

The spelling of 531402730 in words is "five hundred thirty-one million, four hundred two thousand, seven hundred thirty".