531520245 has 16 divisors (see below), whose sum is σ = 944925120. Its totient is φ = 283477392.

The previous prime is 531520243. The next prime is 531520259. The reversal of 531520245 is 542025135.

It is a happy number.

It is not a de Polignac number, because 531520245 - 2¹ = 531520243 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531520243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1968459 + ... + 1968728.

It is an arithmetic number, because the mean of its divisors is an integer number (59057820).

Almost surely, 2^531520245 is an apocalyptic number.

It is an amenable number.

531520245 is a deficient number, since it is larger than the sum of its proper divisors (413404875).

531520245 is a wasteful number, since it uses less digits than its factorization.

531520245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937201 (or 3937195 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 531520245 is about 23054.7228350288. The cubic root of 531520245 is about 810.0402586300.

The spelling of 531520245 in words is "five hundred thirty-one million, five hundred twenty thousand, two hundred forty-five".