400232015 has 4 divisors (see below), whose sum is σ = 480278424. Its totient is φ = 320185608.

The previous prime is 400232009. The next prime is 400232047. The reversal of 400232015 is 510232004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400232015 - 2¹⁶ = 400166479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400231984 and 400232002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40023197 + ... + 40023206.

It is an arithmetic number, because the mean of its divisors is an integer number (120069606).

Almost surely, 2^400232015 is an apocalyptic number.

400232015 is a deficient number, since it is larger than the sum of its proper divisors (80046409).

400232015 is an equidigital number, since it uses as much as digits as its factorization.

400232015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80046408.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400232015 is about 20005.7995341351. The cubic root of 400232015 is about 736.9487306212.

Adding to 400232015 its reverse (510232004), we get a palindrome (910464019).

The spelling of 400232015 in words is "four hundred million, two hundred thirty-two thousand, fifteen".