400142012243 has 4 divisors (see below), whose sum is σ = 400166923608. Its totient is φ = 400117100880.

The previous prime is 400142012227. The next prime is 400142012261. The reversal of 400142012243 is 342210241004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400142012243 - 2⁴ = 400142012227 is a prime.

It is a super-2 number, since 2×400142012243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400142012143) 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, 12431573 + ... + 12463718.

It is an arithmetic number, because the mean of its divisors is an integer number (100041730902).

Almost surely, 2^400142012243 is an apocalyptic number.

400142012243 is a deficient number, since it is larger than the sum of its proper divisors (24911365).

400142012243 is a wasteful number, since it uses less digits than its factorization.

400142012243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24911364.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 400142012243 its reverse (342210241004), we get a palindrome (742352253247).

The spelling of 400142012243 in words is "four hundred billion, one hundred forty-two million, twelve thousand, two hundred forty-three".