2351221435136 has 72 divisors (see below), whose sum is σ = 5364818563104. Its totient is φ = 1007460679680.

The previous prime is 2351221435117. The next prime is 2351221435139. The reversal of 2351221435136 is 6315341221532.

It is a self number, because there is not a number n which added to its sum of digits gives 2351221435136.

It is not an unprimeable number, because it can be changed into a prime (2351221435139) 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, 8816066 + ... + 9078846.

It is an arithmetic number, because the mean of its divisors is an integer number (74511368932).

Almost surely, 2^{2351221435136} is an apocalyptic number.

It is an amenable number.

2351221435136 is an abundant number, since it is smaller than the sum of its proper divisors (3013597127968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2351221435136 is an equidigital number, since it uses as much as digits as its factorization.

2351221435136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267797 (or 267783 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

Adding to 2351221435136 its reverse (6315341221532), we get a palindrome (8666562656668).

The spelling of 2351221435136 in words is "two trillion, three hundred fifty-one billion, two hundred twenty-one million, four hundred thirty-five thousand, one hundred thirty-six".