400295218243 has 4 divisors (see below), whose sum is σ = 400448180440. Its totient is φ = 400142256048.

The previous prime is 400295218237. The next prime is 400295218283. The reversal of 400295218243 is 342812592004.

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 400295218243 - 2³⁷ = 262856264771 is a prime.

It is a super-2 number, since 2×400295218243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400295218196 and 400295218205.

It is not an unprimeable number, because it can be changed into a prime (400295218283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76477173 + ... + 76482406.

It is an arithmetic number, because the mean of its divisors is an integer number (100112045110).

Almost surely, 2^400295218243 is an apocalyptic number.

400295218243 is a deficient number, since it is larger than the sum of its proper divisors (152962197).

400295218243 is a wasteful number, since it uses less digits than its factorization.

400295218243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152962196.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 400295218243 in words is "four hundred billion, two hundred ninety-five million, two hundred eighteen thousand, two hundred forty-three".