145215431553 has 16 divisors (see below), whose sum is σ = 205267305600. Its totient is φ = 91001216256.

The previous prime is 145215431549. The next prime is 145215431563. The reversal of 145215431553 is 355134512541.

It is not a de Polignac number, because 145215431553 - 2² = 145215431549 is a prime.

It is a super-2 number, since 2×145215431553² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145215431503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1745653 + ... + 1826946.

It is an arithmetic number, because the mean of its divisors is an integer number (12829206600).

Almost surely, 2^145215431553 is an apocalyptic number.

It is an amenable number.

145215431553 is a deficient number, since it is larger than the sum of its proper divisors (60051874047).

145215431553 is a wasteful number, since it uses less digits than its factorization.

145215431553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573416.

The product of its digits is 180000, while the sum is 39.

The spelling of 145215431553 in words is "one hundred forty-five billion, two hundred fifteen million, four hundred thirty-one thousand, five hundred fifty-three".