511725617 has 4 divisors (see below), whose sum is σ = 551089140. Its totient is φ = 472362096.

The previous prime is 511725593. The next prime is 511725629. The reversal of 511725617 is 716527115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 120318961 + 391406656 = 10969^2 + 19784^2 .

It is a cyclic number.

It is not a de Polignac number, because 511725617 - 2¹⁶ = 511660081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511725317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19681742 + ... + 19681767.

It is an arithmetic number, because the mean of its divisors is an integer number (137772285).

Almost surely, 2^511725617 is an apocalyptic number.

It is an amenable number.

511725617 is a deficient number, since it is larger than the sum of its proper divisors (39363523).

511725617 is a wasteful number, since it uses less digits than its factorization.

511725617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39363522.

The product of its digits is 14700, while the sum is 35.

The square root of 511725617 is about 22621.3531204479. The cubic root of 511725617 is about 799.8570666516.

The spelling of 511725617 in words is "five hundred eleven million, seven hundred twenty-five thousand, six hundred seventeen".