400523345 has 4 divisors (see below), whose sum is σ = 480628020. Its totient is φ = 320418672.

The previous prime is 400523339. The next prime is 400523351. The reversal of 400523345 is 543325004.

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

It is an interprime number because it is at equal distance from previous prime (400523339) and next prime (400523351).

It can be written as a sum of positive squares in 2 ways, for example, as 236913664 + 163609681 = 15392^2 + 12791^2 .

It is a cyclic number.

It is not a de Polignac number, because 400523345 - 2²⁰ = 399474769 is a prime.

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, 40052330 + ... + 40052339.

It is an arithmetic number, because the mean of its divisors is an integer number (120157005).

Almost surely, 2^400523345 is an apocalyptic number.

It is an amenable number.

400523345 is a deficient number, since it is larger than the sum of its proper divisors (80104675).

400523345 is an equidigital number, since it uses as much as digits as its factorization.

400523345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80104674.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 400523345 is about 20013.0793482662. The cubic root of 400523345 is about 737.1274962657.

Adding to 400523345 its reverse (543325004), we get a palindrome (943848349).

The spelling of 400523345 in words is "four hundred million, five hundred twenty-three thousand, three hundred forty-five".