401225051 has 4 divisors (see below), whose sum is σ = 401880192. Its totient is φ = 400569912.

The previous prime is 401225023. The next prime is 401225081. The reversal of 401225051 is 150522104.

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 401225051 - 2⁶ = 401224987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401225021) 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, 326651 + ... + 327876.

It is an arithmetic number, because the mean of its divisors is an integer number (100470048).

Almost surely, 2^401225051 is an apocalyptic number.

401225051 is a deficient number, since it is larger than the sum of its proper divisors (655141).

401225051 is an equidigital number, since it uses as much as digits as its factorization.

401225051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655140.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 401225051 is about 20030.6028616215. The cubic root of 401225051 is about 737.5577208869.

Adding to 401225051 its reverse (150522104), we get a palindrome (551747155).

The spelling of 401225051 in words is "four hundred one million, two hundred twenty-five thousand, fifty-one".