305131261445061 has 16 divisors (see below), whose sum is σ = 413738316237120. Its totient is φ = 199972540684800.

The previous prime is 305131261444939. The next prime is 305131261445099. The reversal of 305131261445061 is 160544162131503.

It is not a de Polignac number, because 305131261445061 - 2⁹ = 305131261444549 is a prime.

It is a super-2 number, since 2×305131261445061² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305131261445561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79256631 + ... + 83017323.

It is an arithmetic number, because the mean of its divisors is an integer number (25858644764820).

Almost surely, 2^{305131261445061} is an apocalyptic number.

It is an amenable number.

305131261445061 is a deficient number, since it is larger than the sum of its proper divisors (108607054792059).

305131261445061 is a wasteful number, since it uses less digits than its factorization.

305131261445061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4219156.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 305131261445061 in words is "three hundred five trillion, one hundred thirty-one billion, two hundred sixty-one million, four hundred forty-five thousand, sixty-one".