145420450531215 has 48 divisors (see below), whose sum is σ = 247417437671712. Its totient is φ = 72920647499776.

The previous prime is 145420450531087. The next prime is 145420450531313. The reversal of 145420450531215 is 512135054024541.

It is not a de Polignac number, because 145420450531215 - 2⁷ = 145420450531087 is a prime.

It is a super-2 number, since 2×145420450531215² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12932394 + ... + 21402983.

It is an arithmetic number, because the mean of its divisors is an integer number (5154529951494).

Almost surely, 2^{145420450531215} is an apocalyptic number.

145420450531215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145420450531215 is a deficient number, since it is larger than the sum of its proper divisors (101996987140497).

145420450531215 is a wasteful number, since it uses less digits than its factorization.

145420450531215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34336396 (or 34336379 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 145420450531215 in words is "one hundred forty-five trillion, four hundred twenty billion, four hundred fifty million, five hundred thirty-one thousand, two hundred fifteen".