145381215 has 32 divisors (see below), whose sum is σ = 267563520. Its totient is φ = 66029184.

The previous prime is 145381213. The next prime is 145381219. The reversal of 145381215 is 512183541.

It is not a de Polignac number, because 145381215 - 2¹ = 145381213 is a prime.

It is a super-2 number, since 2×145381215² = 42271395349752450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145381213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12076 + ... + 20894.

It is an arithmetic number, because the mean of its divisors is an integer number (8361360).

Almost surely, 2^145381215 is an apocalyptic number.

145381215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145381215 is a deficient number, since it is larger than the sum of its proper divisors (122182305).

145381215 is a wasteful number, since it uses less digits than its factorization.

145381215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8991.

The product of its digits is 4800, while the sum is 30.

The square root of 145381215 is about 12057.4132798043. The cubic root of 145381215 is about 525.8187858563.

It can be divided in two parts, 14538 and 1215, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 145381215 in words is "one hundred forty-five million, three hundred eighty-one thousand, two hundred fifteen".