402251345043321 has 16 divisors (see below), whose sum is σ = 559658831368320. Its totient is φ = 256505910460800.

The previous prime is 402251345043293. The next prime is 402251345043341. The reversal of 402251345043321 is 123340543152204.

It is a happy number.

It is not a de Polignac number, because 402251345043321 - 2⁹ = 402251345042809 is a prime.

It is a super-2 number, since 2×402251345043321² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402251345043321.

It is not an unprimeable number, because it can be changed into a prime (402251345043341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16781530 + ... + 32956371.

It is an arithmetic number, because the mean of its divisors is an integer number (34978676960520).

Almost surely, 2^{402251345043321} is an apocalyptic number.

It is an amenable number.

402251345043321 is a deficient number, since it is larger than the sum of its proper divisors (157407486324999).

402251345043321 is a wasteful number, since it uses less digits than its factorization.

402251345043321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49855136.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 402251345043321 its reverse (123340543152204), we get a palindrome (525591888195525).

The spelling of 402251345043321 in words is "four hundred two trillion, two hundred fifty-one billion, three hundred forty-five million, forty-three thousand, three hundred twenty-one".