511225405 has 8 divisors (see below), whose sum is σ = 619795512. Its totient is φ = 404763648.

The previous prime is 511225397. The next prime is 511225453. The reversal of 511225405 is 504522115.

It can be written as a sum of positive squares in 4 ways, for example, as 126045529 + 385179876 = 11227^2 + 19626^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 511225405 - 2³ = 511225397 is a prime.

It is a super-2 number, since 2×511225405² = 522702829434828050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 511225405.

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, 526552 + ... + 527521.

It is an arithmetic number, because the mean of its divisors is an integer number (77474439).

Almost surely, 2^511225405 is an apocalyptic number.

It is an amenable number.

511225405 is a deficient number, since it is larger than the sum of its proper divisors (108570107).

511225405 is a wasteful number, since it uses less digits than its factorization.

511225405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054175.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 511225405 is about 22610.2942263032. The cubic root of 511225405 is about 799.5963614834.

The spelling of 511225405 in words is "five hundred eleven million, two hundred twenty-five thousand, four hundred five".