400215134 has 32 divisors (see below), whose sum is σ = 685691136. Its totient is φ = 173416320.

The previous prime is 400215133. The next prime is 400215161. The reversal of 400215134 is 431512004.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400215133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169349 + ... + 171695.

It is an arithmetic number, because the mean of its divisors is an integer number (21427848).

Almost surely, 2^400215134 is an apocalyptic number.

400215134 is a deficient number, since it is larger than the sum of its proper divisors (285476002).

400215134 is a wasteful number, since it uses less digits than its factorization.

400215134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 400215134 is about 20005.3776270282. The cubic root of 400215134 is about 736.9383694591.

Adding to 400215134 its reverse (431512004), we get a palindrome (831727138).

The spelling of 400215134 in words is "four hundred million, two hundred fifteen thousand, one hundred thirty-four".