400155522 has 32 divisors (see below), whose sum is σ = 862657152. Its totient is φ = 123012864.

The previous prime is 400155517. The next prime is 400155551. The reversal of 400155522 is 225551004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400155492 and 400155501.

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, 137163 + ... + 140049.

It is an arithmetic number, because the mean of its divisors is an integer number (26958036).

Almost surely, 2^400155522 is an apocalyptic number.

400155522 is an abundant number, since it is smaller than the sum of its proper divisors (462501630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400155522 is a wasteful number, since it uses less digits than its factorization.

400155522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 400155522 is about 20003.8876721501. The cubic root of 400155522 is about 736.9017786794.

The spelling of 400155522 in words is "four hundred million, one hundred fifty-five thousand, five hundred twenty-two".