145453531 has 16 divisors (see below), whose sum is σ = 159127200. Its totient is φ = 132427008.

The previous prime is 145453523. The next prime is 145453543. The reversal of 145453531 is 135354541.

It is a cyclic number.

It is not a de Polignac number, because 145453531 - 2³ = 145453523 is a prime.

It is a super-2 number, since 2×145453531² = 42313459360735922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145453493 and 145453502.

It is not an unprimeable number, because it can be changed into a prime (145453831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152151 + ... + 153103.

It is an arithmetic number, because the mean of its divisors is an integer number (9945450).

Almost surely, 2^145453531 is an apocalyptic number.

145453531 is a deficient number, since it is larger than the sum of its proper divisors (13673669).

145453531 is a wasteful number, since it uses less digits than its factorization.

145453531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278.

The product of its digits is 18000, while the sum is 31.

The square root of 145453531 is about 12060.4117259735. The cubic root of 145453531 is about 525.9059562384.

It can be divided in two parts, 14 and 5453531, that added together give a palindrome (5453545).

The spelling of 145453531 in words is "one hundred forty-five million, four hundred fifty-three thousand, five hundred thirty-one".