400055525 has 6 divisors (see below), whose sum is σ = 496068882. Its totient is φ = 320044400.

The previous prime is 400055519. The next prime is 400055567. The reversal of 400055525 is 525550004.

400055525 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 15856324 + 384199201 = 3982^2 + 19601^2 .

It is not a de Polignac number, because 400055525 - 2²⁶ = 332946661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400055494 and 400055503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8001086 + ... + 8001135.

It is an arithmetic number, because the mean of its divisors is an integer number (82678147).

Almost surely, 2^400055525 is an apocalyptic number.

It is an amenable number.

400055525 is a deficient number, since it is larger than the sum of its proper divisors (96013357).

400055525 is a wasteful number, since it uses less digits than its factorization.

400055525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16002231 (or 16002226 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 400055525 is about 20001.3880768311. The cubic root of 400055525 is about 736.8403907922.

The spelling of 400055525 in words is "four hundred million, fifty-five thousand, five hundred twenty-five".