400021155134 has 16 divisors (see below), whose sum is σ = 609066062208. Its totient is φ = 196999905432.

The previous prime is 400021155119. The next prime is 400021155187. The reversal of 400021155134 is 431551120004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870767 + ... + 1248309.

It is an arithmetic number, because the mean of its divisors is an integer number (38066628888).

Almost surely, 2^400021155134 is an apocalyptic number.

400021155134 is a deficient number, since it is larger than the sum of its proper divisors (209044907074).

400021155134 is a wasteful number, since it uses less digits than its factorization.

400021155134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385519.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 400021155134 its reverse (431551120004), we get a palindrome (831572275138).

The spelling of 400021155134 in words is "four hundred billion, twenty-one million, one hundred fifty-five thousand, one hundred thirty-four".