402144531 has 16 divisors (see below), whose sum is σ = 546393600. Its totient is φ = 263014688.

The previous prime is 402144521. The next prime is 402144539. The reversal of 402144531 is 135441204.

It is a cyclic number.

It is not a de Polignac number, because 402144531 - 2⁵ = 402144499 is a prime.

It is a super-2 number, since 2×402144531² = 323440447626419922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402144539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96550 + ... + 100628.

It is an arithmetic number, because the mean of its divisors is an integer number (34149600).

Almost surely, 2^402144531 is an apocalyptic number.

402144531 is a deficient number, since it is larger than the sum of its proper divisors (144249069).

402144531 is a wasteful number, since it uses less digits than its factorization.

402144531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 402144531 is about 20053.5416074069. The cubic root of 402144531 is about 738.1207068225.

Adding to 402144531 its reverse (135441204), we get a palindrome (537585735).

The spelling of 402144531 in words is "four hundred two million, one hundred forty-four thousand, five hundred thirty-one".