402531201 has 28 divisors (see below), whose sum is σ = 607537492. Its totient is φ = 266569056.

The previous prime is 402531197. The next prime is 402531203. The reversal of 402531201 is 102135204.

It can be written as a sum of positive squares in 2 ways, for example, as 273935601 + 128595600 = 16551^2 + 11340^2 .

It is not a de Polignac number, because 402531201 - 2² = 402531197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402531203) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 112695 + ... + 116211.

Almost surely, 2^402531201 is an apocalyptic number.

It is an amenable number.

402531201 is a deficient number, since it is larger than the sum of its proper divisors (205006291).

402531201 is an equidigital number, since it uses as much as digits as its factorization.

402531201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3692 (or 3677 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 402531201 is about 20063.1802314588. The cubic root of 402531201 is about 738.3572036415.

Adding to 402531201 its reverse (102135204), we get a palindrome (504666405).

The spelling of 402531201 in words is "four hundred two million, five hundred thirty-one thousand, two hundred one".