402217601 has 8 divisors (see below), whose sum is σ = 406396224. Its totient is φ = 398046960.

The previous prime is 402217589. The next prime is 402217609. The reversal of 402217601 is 106712204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402217601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402217609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194891 + ... + 196943.

It is an arithmetic number, because the mean of its divisors is an integer number (50799528).

Almost surely, 2^402217601 is an apocalyptic number.

It is an amenable number.

402217601 is a deficient number, since it is larger than the sum of its proper divisors (4178623).

402217601 is a wasteful number, since it uses less digits than its factorization.

402217601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 402217601 is about 20055.3633973558. The cubic root of 402217601 is about 738.1654098332.

Adding to 402217601 its reverse (106712204), we get a palindrome (508929805).

The spelling of 402217601 in words is "four hundred two million, two hundred seventeen thousand, six hundred one".