400021155325 has 12 divisors (see below), whose sum is σ = 541119526848. Its totient is φ = 290924476400.

The previous prime is 400021155293. The next prime is 400021155371. The reversal of 400021155325 is 523551120004.

It is not a de Polignac number, because 400021155325 - 2⁵ = 400021155293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400021155293 and 400021155302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 727310917 + ... + 727311466.

It is an arithmetic number, because the mean of its divisors is an integer number (45093293904).

Almost surely, 2^400021155325 is an apocalyptic number.

It is an amenable number.

400021155325 is a deficient number, since it is larger than the sum of its proper divisors (141098371523).

400021155325 is a wasteful number, since it uses less digits than its factorization.

400021155325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454622404 (or 1454622399 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 400021155325 its reverse (523551120004), we get a palindrome (923572275329).

The spelling of 400021155325 in words is "four hundred billion, twenty-one million, one hundred fifty-five thousand, three hundred twenty-five".