400243242513 has 8 divisors (see below), whose sum is σ = 541622696608. Its totient is φ = 262846308384.

The previous prime is 400243242473. The next prime is 400243242517. The reversal of 400243242513 is 315242342004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400243242513 - 2⁶ = 400243242449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400243242517) 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, 995629756 + ... + 995630157.

It is an arithmetic number, because the mean of its divisors is an integer number (67702837076).

Almost surely, 2^400243242513 is an apocalyptic number.

It is an amenable number.

400243242513 is a deficient number, since it is larger than the sum of its proper divisors (141379454095).

400243242513 is a wasteful number, since it uses less digits than its factorization.

400243242513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991259983.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 400243242513 its reverse (315242342004), we get a palindrome (715485584517).

The spelling of 400243242513 in words is "four hundred billion, two hundred forty-three million, two hundred forty-two thousand, five hundred thirteen".