400230553 has 6 divisors (see below), whose sum is σ = 413558682. Its totient is φ = 387318960.

The previous prime is 400230529. The next prime is 400230559. The reversal of 400230553 is 355032004.

It can be written as a sum of positive squares in only one way, i.e., 224190729 + 176039824 = 14973^2 + 13268^2 .

It is a de Polignac number, because none of the positive numbers 2^k-400230553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400230559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207276 + ... + 209197.

It is an arithmetic number, because the mean of its divisors is an integer number (68926447).

Almost surely, 2^400230553 is an apocalyptic number.

It is an amenable number.

400230553 is a deficient number, since it is larger than the sum of its proper divisors (13328129).

400230553 is an equidigital number, since it uses as much as digits as its factorization.

400230553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416535 (or 416504 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 400230553 is about 20005.7629946973. The cubic root of 400230553 is about 736.9478332914.

Adding to 400230553 its reverse (355032004), we get a palindrome (755262557).

The spelling of 400230553 in words is "four hundred million, two hundred thirty thousand, five hundred fifty-three".