531401438 has 4 divisors (see below), whose sum is σ = 797102160. Its totient is φ = 265700718.

The previous prime is 531401413. The next prime is 531401527. The reversal of 531401438 is 834104135.

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

It is a self number, because there is not a number n which added to its sum of digits gives 531401438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132850358 + ... + 132850361.

It is an arithmetic number, because the mean of its divisors is an integer number (199275540).

Almost surely, 2^531401438 is an apocalyptic number.

531401438 is a deficient number, since it is larger than the sum of its proper divisors (265700722).

531401438 is a wasteful number, since it uses less digits than its factorization.

531401438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265700721.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 531401438 is about 23052.1460606166. The cubic root of 531401438 is about 809.9798999229.

The spelling of 531401438 in words is "five hundred thirty-one million, four hundred one thousand, four hundred thirty-eight".