400230513 has 12 divisors (see below), whose sum is σ = 578627140. Its totient is φ = 266582016.

The previous prime is 400230503. The next prime is 400230527. The reversal of 400230513 is 315032004.

It can be written as a sum of positive squares in 2 ways, for example, as 291487329 + 108743184 = 17073^2 + 10428^2 .

It is not a de Polignac number, because 400230513 - 2⁶ = 400230449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400230503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8908 + ... + 29661.

Almost surely, 2^400230513 is an apocalyptic number.

It is an amenable number.

400230513 is a deficient number, since it is larger than the sum of its proper divisors (178396627).

400230513 is a wasteful number, since it uses less digits than its factorization.

400230513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39728 (or 39725 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 400230513 is about 20005.7619949853. The cubic root of 400230513 is about 736.9478087406.

Adding to 400230513 its reverse (315032004), we get a palindrome (715262517).

The spelling of 400230513 in words is "four hundred million, two hundred thirty thousand, five hundred thirteen".