145387216 has 20 divisors (see below), whose sum is σ = 303356452. Its totient is φ = 67101696.

The previous prime is 145387157. The next prime is 145387223. The reversal of 145387216 is 612783541.

It can be written as a sum of positive squares in 2 ways, for example, as 99201600 + 46185616 = 9960^2 + 6796^2 .

It is a super-2 number, since 2×145387216² = 42274885152461312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349281 + ... + 349696.

Almost surely, 2^145387216 is an apocalyptic number.

145387216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145387216 is an abundant number, since it is smaller than the sum of its proper divisors (157969236).

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

145387216 is a wasteful number, since it uses less digits than its factorization.

145387216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698998 (or 698992 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 145387216 is about 12057.6621282900. The cubic root of 145387216 is about 525.8260206174.

The spelling of 145387216 in words is "one hundred forty-five million, three hundred eighty-seven thousand, two hundred sixteen".