145527381 has 16 divisors (see below), whose sum is σ = 215784000. Its totient is φ = 96933744.

The previous prime is 145527379. The next prime is 145527391. The reversal of 145527381 is 183725541.

It is not a de Polignac number, because 145527381 - 2¹ = 145527379 is a prime.

It is a super-2 number, since 2×145527381² = 42356437241438322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145527331) 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, 52570 + ... + 55268.

It is an arithmetic number, because the mean of its divisors is an integer number (13486500).

Almost surely, 2^145527381 is an apocalyptic number.

It is an amenable number.

145527381 is a deficient number, since it is larger than the sum of its proper divisors (70256619).

145527381 is a wasteful number, since it uses less digits than its factorization.

145527381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705 (or 4699 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 145527381 is about 12063.4730073889. The cubic root of 145527381 is about 525.9949459051.

The spelling of 145527381 in words is "one hundred forty-five million, five hundred twenty-seven thousand, three hundred eighty-one".