400231015 has 8 divisors (see below), whose sum is σ = 483224688. Its totient is φ = 318219840.

The previous prime is 400231009. The next prime is 400231019. The reversal of 400231015 is 510132004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400231015 - 2⁹ = 400230503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400231015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400231019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244726 + ... + 246355.

It is an arithmetic number, because the mean of its divisors is an integer number (60403086).

Almost surely, 2^400231015 is an apocalyptic number.

400231015 is a deficient number, since it is larger than the sum of its proper divisors (82993673).

400231015 is a wasteful number, since it uses less digits than its factorization.

400231015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491249.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 400231015 is about 20005.7745413668. The cubic root of 400231015 is about 736.9481168528.

Adding to 400231015 its reverse (510132004), we get a palindrome (910363019).

The spelling of 400231015 in words is "four hundred million, two hundred thirty-one thousand, fifteen".