400220453023 has 4 divisors (see below), whose sum is σ = 400228435080. Its totient is φ = 400212470968.

The previous prime is 400220452997. The next prime is 400220453057. The reversal of 400220453023 is 320354022004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400220453023 is a prime.

It is a super-2 number, since 2×400220453023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400220453093) 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, 3915340 + ... + 4016257.

It is an arithmetic number, because the mean of its divisors is an integer number (100057108770).

Almost surely, 2^400220453023 is an apocalyptic number.

400220453023 is a deficient number, since it is larger than the sum of its proper divisors (7982057).

400220453023 is an equidigital number, since it uses as much as digits as its factorization.

400220453023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982056.

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 400220453023 its reverse (320354022004), we get a palindrome (720574475027).

The spelling of 400220453023 in words is "four hundred billion, two hundred twenty million, four hundred fifty-three thousand, twenty-three".