513442361 has 8 divisors (see below), whose sum is σ = 538425480. Its totient is φ = 488944512.

The previous prime is 513442343. The next prime is 513442379. The reversal of 513442361 is 163244315.

It is an interprime number because it is at equal distance from previous prime (513442343) and next prime (513442379).

It can be written as a sum of positive squares in 4 ways, for example, as 36675136 + 476767225 = 6056^2 + 21835^2 .

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 513442361 - 2⁶ = 513442297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513442261) 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, 119150 + ... + 123383.

It is an arithmetic number, because the mean of its divisors is an integer number (67303185).

Almost surely, 2^513442361 is an apocalyptic number.

It is an amenable number.

513442361 is a deficient number, since it is larger than the sum of its proper divisors (24983119).

513442361 is a wasteful number, since it uses less digits than its factorization.

513442361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242635.

The product of its digits is 8640, while the sum is 29.

The square root of 513442361 is about 22659.2665591806. The cubic root of 513442361 is about 800.7505253569.

Adding to 513442361 its reverse (163244315), we get a palindrome (676686676).

The spelling of 513442361 in words is "five hundred thirteen million, four hundred forty-two thousand, three hundred sixty-one".