402400242253 has 8 divisors (see below), whose sum is σ = 412362609048. Its totient is φ = 392525649984.

The previous prime is 402400242239. The next prime is 402400242259. The reversal of 402400242253 is 352242004204.

It can be written as a sum of positive squares in 4 ways, for example, as 224124602724 + 178275639529 = 473418^2 + 422227^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 402400242253 - 2⁵ = 402400242221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402400242259) 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, 21934350 + ... + 21952687.

It is an arithmetic number, because the mean of its divisors is an integer number (51545326131).

Almost surely, 2^402400242253 is an apocalyptic number.

It is an amenable number.

402400242253 is a deficient number, since it is larger than the sum of its proper divisors (9962366795).

402400242253 is a wasteful number, since it uses less digits than its factorization.

402400242253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43887263.

The product of its (nonzero) digits is 15360, while the sum is 28.

Adding to 402400242253 its reverse (352242004204), we get a palindrome (754642246457).

The spelling of 402400242253 in words is "four hundred two billion, four hundred million, two hundred forty-two thousand, two hundred fifty-three".