513225401 has 4 divisors (see below), whose sum is σ = 552704292. Its totient is φ = 473746512.

The previous prime is 513225329. The next prime is 513225403. The reversal of 513225401 is 104522315.

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 135117376 + 378108025 = 11624^2 + 19445^2 .

It is a cyclic number.

It is not a de Polignac number, because 513225401 - 2²² = 509031097 is a prime.

It is a super-2 number, since 2×513225401² = 526800624463221602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513225403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19739426 + ... + 19739451.

It is an arithmetic number, because the mean of its divisors is an integer number (138176073).

Almost surely, 2^513225401 is an apocalyptic number.

It is an amenable number.

513225401 is a deficient number, since it is larger than the sum of its proper divisors (39478891).

513225401 is a wasteful number, since it uses less digits than its factorization.

513225401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39478890.

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

The square root of 513225401 is about 22654.4786079927. The cubic root of 513225401 is about 800.6377211920.

Adding to 513225401 its reverse (104522315), we get a palindrome (617747716).

The spelling of 513225401 in words is "five hundred thirteen million, two hundred twenty-five thousand, four hundred one".