513212405 has 8 divisors (see below), whose sum is σ = 652081752. Its totient is φ = 386418688.

The previous prime is 513212393. The next prime is 513212407. The reversal of 513212405 is 504212315.

It can be written as a sum of positive squares in 4 ways, for example, as 97337956 + 415874449 = 9866^2 + 20393^2 .

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 513212405 - 2⁴ = 513212389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513212407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3018812 + ... + 3018981.

It is an arithmetic number, because the mean of its divisors is an integer number (81510219).

Almost surely, 2^513212405 is an apocalyptic number.

It is an amenable number.

513212405 is a deficient number, since it is larger than the sum of its proper divisors (138869347).

513212405 is a wasteful number, since it uses less digits than its factorization.

513212405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037815.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 513212405 is about 22654.1917754750. The cubic root of 513212405 is about 800.6309631635.

The spelling of 513212405 in words is "five hundred thirteen million, two hundred twelve thousand, four hundred five".