145531455 has 16 divisors (see below), whose sum is σ = 233142624. Its totient is φ = 77519360.

The previous prime is 145531433. The next prime is 145531489. The reversal of 145531455 is 554135541.

145531455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145531455 - 2¹⁷ = 145400383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7195 + ... + 18515.

It is an arithmetic number, because the mean of its divisors is an integer number (14571414).

Almost surely, 2^145531455 is an apocalyptic number.

145531455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145531455 is a deficient number, since it is larger than the sum of its proper divisors (87611169).

145531455 is a wasteful number, since it uses less digits than its factorization.

145531455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12186.

The product of its digits is 30000, while the sum is 33.

The square root of 145531455 is about 12063.6418630528. The cubic root of 145531455 is about 525.9998542217. Note that the first 3 decimals are identical.

Adding to 145531455 its reverse (554135541), we get a palindrome (699666996).

The spelling of 145531455 in words is "one hundred forty-five million, five hundred thirty-one thousand, four hundred fifty-five".