253420340445321 has 32 divisors (see below), whose sum is σ = 399615438954240. Its totient is φ = 139770834099456.

The previous prime is 253420340445313. The next prime is 253420340445353. The reversal of 253420340445321 is 123544043024352.

It is not a de Polignac number, because 253420340445321 - 2³ = 253420340445313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253420340445421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68561946 + ... + 72163571.

It is an arithmetic number, because the mean of its divisors is an integer number (12487982467320).

Almost surely, 2^{253420340445321} is an apocalyptic number.

253420340445321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

253420340445321 is a deficient number, since it is larger than the sum of its proper divisors (146195098508919).

253420340445321 is a wasteful number, since it uses less digits than its factorization.

253420340445321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140728513.

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 253420340445321 its reverse (123544043024352), we get a palindrome (376964383469673).

The spelling of 253420340445321 in words is "two hundred fifty-three trillion, four hundred twenty billion, three hundred forty million, four hundred forty-five thousand, three hundred twenty-one".