145315335436521 has 32 divisors (see below), whose sum is σ = 198041076240000. Its totient is φ = 94758535065600.

The previous prime is 145315335436507. The next prime is 145315335436559. The reversal of 145315335436521 is 125634533513541.

It is not a de Polignac number, because 145315335436521 - 2¹⁰ = 145315335435497 is a prime.

It is a super-2 number, since 2×145315335436521² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145315335436591) 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, 7389105 + ... + 18580353.

It is an arithmetic number, because the mean of its divisors is an integer number (6188783632500).

Almost surely, 2^{145315335436521} is an apocalyptic number.

It is an amenable number.

145315335436521 is a deficient number, since it is larger than the sum of its proper divisors (52725740803479).

145315335436521 is a wasteful number, since it uses less digits than its factorization.

145315335436521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11191817.

The product of its digits is 9720000, while the sum is 51.

The spelling of 145315335436521 in words is "one hundred forty-five trillion, three hundred fifteen billion, three hundred thirty-five million, four hundred thirty-six thousand, five hundred twenty-one".