400200031 has 8 divisors (see below), whose sum is σ = 498950784. Its totient is φ = 311844120.

The previous prime is 400199993. The next prime is 400200041. The reversal of 400200031 is 130002004.

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

It is not a de Polignac number, because 400200031 - 2⁹ = 400199519 is a prime.

It is a super-2 number, since 2×400200031² = 320320129624801922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400199990 and 400200017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400200041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2598625 + ... + 2598778.

It is an arithmetic number, because the mean of its divisors is an integer number (62368848).

Almost surely, 2^400200031 is an apocalyptic number.

400200031 is a deficient number, since it is larger than the sum of its proper divisors (98750753).

400200031 is a wasteful number, since it uses less digits than its factorization.

400200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197421.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 400200031 is about 20005.0001499625. Note that the first 3 decimals coincide. The cubic root of 400200031 is about 736.9290993447.

Adding to 400200031 its reverse (130002004), we get a palindrome (530202035).

The spelling of 400200031 in words is "four hundred million, two hundred thousand, thirty-one".