402441340221 has 48 divisors (see below), whose sum is σ = 633873166080. Its totient is φ = 252301063680.

The previous prime is 402441340207. The next prime is 402441340253. The reversal of 402441340221 is 122043144204.

402441340221 is a `hidden beast` number, since 4 + 0 + 24 + 413 + 4 + 0 + 221 = 666.

It is not a de Polignac number, because 402441340221 - 2²² = 402437145917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402441340121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9584545 + ... + 9626441.

It is an arithmetic number, because the mean of its divisors is an integer number (13205690960).

Almost surely, 2^402441340221 is an apocalyptic number.

It is an amenable number.

402441340221 is a deficient number, since it is larger than the sum of its proper divisors (231431825859).

402441340221 is a wasteful number, since it uses less digits than its factorization.

402441340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43171 (or 43148 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 402441340221 its reverse (122043144204), we get a palindrome (524484484425).

The spelling of 402441340221 in words is "four hundred two billion, four hundred forty-one million, three hundred forty thousand, two hundred twenty-one".