531401806 has 16 divisors (see below), whose sum is σ = 858798864. Its totient is φ = 245153664.

The previous prime is 531401791. The next prime is 531401813. The reversal of 531401806 is 608104135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107910 + ... + 112726.

It is an arithmetic number, because the mean of its divisors is an integer number (53674929).

Almost surely, 2^531401806 is an apocalyptic number.

531401806 is a deficient number, since it is larger than the sum of its proper divisors (327397058).

531401806 is a wasteful number, since it uses less digits than its factorization.

531401806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 531401806 is about 23052.1540425185. The cubic root of 531401806 is about 809.9800868955.

It can be divided in two parts, 53140 and 1806, that added together give a triangular number (54946 = T₃₃₁).

The spelling of 531401806 in words is "five hundred thirty-one million, four hundred one thousand, eight hundred six".