400221025455 has 16 divisors (see below), whose sum is σ = 641881941120. Its totient is φ = 212941780128.

The previous prime is 400221025409. The next prime is 400221025483. The reversal of 400221025455 is 554520122004.

It is not a de Polignac number, because 400221025455 - 2⁹ = 400221024943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31833097 + ... + 31845666.

It is an arithmetic number, because the mean of its divisors is an integer number (40117621320).

Almost surely, 2^400221025455 is an apocalyptic number.

400221025455 is a deficient number, since it is larger than the sum of its proper divisors (241660915665).

400221025455 is a wasteful number, since it uses less digits than its factorization.

400221025455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63679190.

The product of its (nonzero) digits is 16000, while the sum is 30.

Adding to 400221025455 its reverse (554520122004), we get a palindrome (954741147459).

The spelling of 400221025455 in words is "four hundred billion, two hundred twenty-one million, twenty-five thousand, four hundred fifty-five".