145215525 has 48 divisors (see below), whose sum is σ = 295508864. Its totient is φ = 61274880.

The previous prime is 145215523. The next prime is 145215527. The reversal of 145215525 is 525512541.

It is an interprime number because it is at equal distance from previous prime (145215523) and next prime (145215527).

It is not a de Polignac number, because 145215525 - 2¹ = 145215523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145215492 and 145215501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145215523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3814 + ... + 17463.

Almost surely, 2^145215525 is an apocalyptic number.

145215525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145215525 is an abundant number, since it is smaller than the sum of its proper divisors (150293339).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145215525 is a wasteful number, since it uses less digits than its factorization.

145215525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21310 (or 21305 counting only the distinct ones).

The product of its digits is 10000, while the sum is 30.

The square root of 145215525 is about 12050.5404443120. The cubic root of 145215525 is about 525.6189525344.

The spelling of 145215525 in words is "one hundred forty-five million, two hundred fifteen thousand, five hundred twenty-five".