402155051 has 4 divisors (see below), whose sum is σ = 402212112. Its totient is φ = 402097992.

The previous prime is 402155041. The next prime is 402155053. The reversal of 402155051 is 150551204.

It is a happy number.

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 402155051 - 2²² = 397960747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402155053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16175 + ... + 32648.

It is an arithmetic number, because the mean of its divisors is an integer number (100553028).

Almost surely, 2^402155051 is an apocalyptic number.

402155051 is a deficient number, since it is larger than the sum of its proper divisors (57061).

402155051 is an equidigital number, since it uses as much as digits as its factorization.

402155051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57060.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 402155051 is about 20053.8039034992. The cubic root of 402155051 is about 738.1271431172.

The spelling of 402155051 in words is "four hundred two million, one hundred fifty-five thousand, fifty-one".