145221400505241 has 40 divisors (see below), whose sum is σ = 228459014775200. Its totient is φ = 91676334418560.

The previous prime is 145221400505219. The next prime is 145221400505261. The reversal of 145221400505241 is 142505004122541.

145221400505241 is a `hidden beast` number, since 1 + 4 + 5 + 2 + 2 + 1 + 400 + 5 + 0 + 5 + 241 = 666.

It is not a de Polignac number, because 145221400505241 - 2⁷ = 145221400505113 is a prime.

It is a super-2 number, since 2×145221400505241² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145221400505196 and 145221400505205.

It is not an unprimeable number, because it can be changed into a prime (145221400505261) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18506911 + ... + 25158468.

It is an arithmetic number, because the mean of its divisors is an integer number (5711475369380).

Almost surely, 2^{145221400505241} is an apocalyptic number.

It is an amenable number.

145221400505241 is a deficient number, since it is larger than the sum of its proper divisors (83237614269959).

145221400505241 is a wasteful number, since it uses less digits than its factorization.

145221400505241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43667571 (or 43667562 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

Adding to 145221400505241 its reverse (142505004122541), we get a palindrome (287726404627782).

The spelling of 145221400505241 in words is "one hundred forty-five trillion, two hundred twenty-one billion, four hundred million, five hundred five thousand, two hundred forty-one".