513220429 has 4 divisors (see below), whose sum is σ = 543409884. Its totient is φ = 483030976.

The previous prime is 513220427. The next prime is 513220439. The reversal of 513220429 is 924022315.

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 275228100 + 237992329 = 16590^2 + 15427^2 .

It is a cyclic number.

It is not a de Polignac number, because 513220429 - 2¹ = 513220427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513220397 and 513220406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513220427) 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, 15094702 + ... + 15094735.

It is an arithmetic number, because the mean of its divisors is an integer number (135852471).

Almost surely, 2^513220429 is an apocalyptic number.

It is an amenable number.

513220429 is a deficient number, since it is larger than the sum of its proper divisors (30189455).

513220429 is a wasteful number, since it uses less digits than its factorization.

513220429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30189454.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 513220429 is about 22654.3688722507. The cubic root of 513220429 is about 800.6351357240.

The spelling of 513220429 in words is "five hundred thirteen million, two hundred twenty thousand, four hundred twenty-nine".