400202155 has 4 divisors (see below), whose sum is σ = 480242592. Its totient is φ = 320161720.

The previous prime is 400202147. The next prime is 400202171. The reversal of 400202155 is 551202004.

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

It is not a de Polignac number, because 400202155 - 2³ = 400202147 is a prime.

It is a Duffinian number.

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, 40020211 + ... + 40020220.

It is an arithmetic number, because the mean of its divisors is an integer number (120060648).

Almost surely, 2^400202155 is an apocalyptic number.

400202155 is a deficient number, since it is larger than the sum of its proper divisors (80040437).

400202155 is an equidigital number, since it uses as much as digits as its factorization.

400202155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80040436.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 400202155 is about 20005.0532366200. The cubic root of 400202155 is about 736.9304030549.

Adding to 400202155 its reverse (551202004), we get a palindrome (951404159).

The spelling of 400202155 in words is "four hundred million, two hundred two thousand, one hundred fifty-five".