400420205533351 has 4 divisors (see below), whose sum is σ = 404919308966400. Its totient is φ = 395921102100304.

The previous prime is 400420205533319. The next prime is 400420205533373. The reversal of 400420205533351 is 153335502024004.

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

It is a cyclic number.

It is not a de Polignac number, because 400420205533351 - 2⁵ = 400420205533319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400420205533351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400420205533391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2249551716391 + ... + 2249551716568.

It is an arithmetic number, because the mean of its divisors is an integer number (101229827241600).

Almost surely, 2^{400420205533351} is an apocalyptic number.

400420205533351 is a deficient number, since it is larger than the sum of its proper divisors (4499103433049).

400420205533351 is an equidigital number, since it uses as much as digits as its factorization.

400420205533351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499103433048.

The product of its (nonzero) digits is 216000, while the sum is 37.

Adding to 400420205533351 its reverse (153335502024004), we get a palindrome (553755707557355).

The spelling of 400420205533351 in words is "four hundred trillion, four hundred twenty billion, two hundred five million, five hundred thirty-three thousand, three hundred fifty-one".