400232501 has 4 divisors (see below), whose sum is σ = 405715212. Its totient is φ = 394749792.

The previous prime is 400232477. The next prime is 400232533. The reversal of 400232501 is 105232004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 316875601 + 83356900 = 17801^2 + 9130^2 .

It is a cyclic number.

It is not a de Polignac number, because 400232501 - 2¹⁰ = 400231477 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 400232501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400232551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2741246 + ... + 2741391.

It is an arithmetic number, because the mean of its divisors is an integer number (101428803).

Almost surely, 2^400232501 is an apocalyptic number.

It is an amenable number.

400232501 is a deficient number, since it is larger than the sum of its proper divisors (5482711).

400232501 is an equidigital number, since it uses as much as digits as its factorization.

400232501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482710.

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

The square root of 400232501 is about 20005.8116806092. The cubic root of 400232501 is about 736.9490289123.

Adding to 400232501 its reverse (105232004), we get a palindrome (505464505).

It can be divided in two parts, 40023 and 2501, that added together give a palindrome (42524).

The spelling of 400232501 in words is "four hundred million, two hundred thirty-two thousand, five hundred one".