400425555 has 16 divisors (see below), whose sum is σ = 641032704. Its totient is φ = 213443040.

The previous prime is 400425541. The next prime is 400425563. The reversal of 400425555 is 555524004.

It is not a de Polignac number, because 400425555 - 2¹⁴ = 400409171 is a prime.

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, 25702 + ... + 38228.

It is an arithmetic number, because the mean of its divisors is an integer number (40064544).

Almost surely, 2^400425555 is an apocalyptic number.

400425555 is a deficient number, since it is larger than the sum of its proper divisors (240607149).

400425555 is a wasteful number, since it uses less digits than its factorization.

400425555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14666.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 400425555 is about 20010.6360468627. The cubic root of 400425555 is about 737.0675001248.

Adding to 400425555 its reverse (555524004), we get a palindrome (955949559).

The spelling of 400425555 in words is "four hundred million, four hundred twenty-five thousand, five hundred fifty-five".