512540345 has 16 divisors (see below), whose sum is σ = 642114000. Its totient is φ = 392249088.

The previous prime is 512540341. The next prime is 512540363. The reversal of 512540345 is 543045215.

It can be written as a sum of positive squares in 8 ways, for example, as 12033961 + 500506384 = 3469^2 + 22372^2 .

It is a cyclic number.

It is not a de Polignac number, because 512540345 - 2² = 512540341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (512540341) 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, 410 + ... + 32019.

It is an arithmetic number, because the mean of its divisors is an integer number (40132125).

Almost surely, 2^512540345 is an apocalyptic number.

It is an amenable number.

512540345 is a deficient number, since it is larger than the sum of its proper divisors (129573655).

512540345 is a wasteful number, since it uses less digits than its factorization.

512540345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32572.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 512540345 is about 22639.3538997914. The cubic root of 512540345 is about 800.2813307422.

The spelling of 512540345 in words is "five hundred twelve million, five hundred forty thousand, three hundred forty-five".