401642200251 has 6 divisors (see below), whose sum is σ = 580149844820. Its totient is φ = 267761466828.

The previous prime is 401642200207. The next prime is 401642200283. The reversal of 401642200251 is 152002246104.

401642200251 is a `hidden beast` number, since 401 + 6 + 4 + 2 + 2 + 0 + 0 + 251 = 666.

It is not a de Polignac number, because 401642200251 - 2⁷ = 401642200123 is a prime.

It is a super-2 number, since 2×401642200251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401642200291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22313455561 + ... + 22313455578.

Almost surely, 2^401642200251 is an apocalyptic number.

401642200251 is a deficient number, since it is larger than the sum of its proper divisors (178507644569).

401642200251 is a wasteful number, since it uses less digits than its factorization.

401642200251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44626911145 (or 44626911142 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 401642200251 its reverse (152002246104), we get a palindrome (553644446355).

The spelling of 401642200251 in words is "four hundred one billion, six hundred forty-two million, two hundred thousand, two hundred fifty-one".