531531045 has 16 divisors (see below), whose sum is σ = 944944320. Its totient is φ = 283483152.

The previous prime is 531531029. The next prime is 531531079. The reversal of 531531045 is 540135135.

It is not a de Polignac number, because 531531045 - 2⁴ = 531531029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1968499 + ... + 1968768.

It is an arithmetic number, because the mean of its divisors is an integer number (59059020).

Almost surely, 2^531531045 is an apocalyptic number.

It is an amenable number.

531531045 is a deficient number, since it is larger than the sum of its proper divisors (413413275).

531531045 is a wasteful number, since it uses less digits than its factorization.

531531045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937281 (or 3937275 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 531531045 is about 23054.9570591663. The cubic root of 531531045 is about 810.0457450159.

The spelling of 531531045 in words is "five hundred thirty-one million, five hundred thirty-one thousand, forty-five".