305144104255421 has 32 divisors (see below), whose sum is σ = 330725399735808. Its totient is φ = 280789398236160.

The previous prime is 305144104255409. The next prime is 305144104255433. The reversal of 305144104255421 is 124552401441503.

It is an interprime number because it is at equal distance from previous prime (305144104255409) and next prime (305144104255433).

It is not a de Polignac number, because 305144104255421 - 2⁶ = 305144104255357 is a prime.

It is a super-2 number, since 2×305144104255421² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305144104275421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285630560 + ... + 286696886.

It is an arithmetic number, because the mean of its divisors is an integer number (10335168741744).

Almost surely, 2^{305144104255421} is an apocalyptic number.

It is an amenable number.

305144104255421 is a deficient number, since it is larger than the sum of its proper divisors (25581295480387).

305144104255421 is a wasteful number, since it uses less digits than its factorization.

305144104255421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070621.

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 305144104255421 its reverse (124552401441503), we get a palindrome (429696505696924).

The spelling of 305144104255421 in words is "three hundred five trillion, one hundred forty-four billion, one hundred four million, two hundred fifty-five thousand, four hundred twenty-one".