402022651 has 4 divisors (see below), whose sum is σ = 402567400. Its totient is φ = 401477904.

The previous prime is 402022619. The next prime is 402022669. The reversal of 402022651 is 156220204.

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 402022651 - 2⁵ = 402022619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402002651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271266 + ... + 272743.

It is an arithmetic number, because the mean of its divisors is an integer number (100641850).

Almost surely, 2^402022651 is an apocalyptic number.

402022651 is a deficient number, since it is larger than the sum of its proper divisors (544749).

402022651 is an equidigital number, since it uses as much as digits as its factorization.

402022651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544748.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 402022651 is about 20050.5025124060. The cubic root of 402022651 is about 738.0461306152.

Adding to 402022651 its reverse (156220204), we get a palindrome (558242855).

The spelling of 402022651 in words is "four hundred two million, twenty-two thousand, six hundred fifty-one".