400202231 has 32 divisors (see below), whose sum is σ = 493516800. Its totient is φ = 319334400.

The previous prime is 400202203. The next prime is 400202303. The reversal of 400202231 is 132202004.

It is not a de Polignac number, because 400202231 - 2¹⁸ = 399940087 is a prime.

It is a super-2 number, since 2×400202231² = 320323651394754722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400202531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 891095 + ... + 891543.

It is an arithmetic number, because the mean of its divisors is an integer number (15422400).

Almost surely, 2^400202231 is an apocalyptic number.

400202231 is a deficient number, since it is larger than the sum of its proper divisors (93314569).

400202231 is a wasteful number, since it uses less digits than its factorization.

400202231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 400202231 is about 20005.0551361400. The cubic root of 400202231 is about 736.9304497036.

Adding to 400202231 its reverse (132202004), we get a palindrome (532404235).

The spelling of 400202231 in words is "four hundred million, two hundred two thousand, two hundred thirty-one".