150021645 has 8 divisors (see below), whose sum is σ = 240034656. Its totient is φ = 80011536.

The previous prime is 150021637. The next prime is 150021647. The reversal of 150021645 is 546120051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 150021645 - 2³ = 150021637 is a prime.

It is a super-3 number, since 3×150021645³ (a number of 26 digits) contains 333 as substring.

150021645 is a modest number, since divided by 21645 gives 150 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150021647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5000707 + ... + 5000736.

It is an arithmetic number, because the mean of its divisors is an integer number (30004332).

Almost surely, 2^150021645 is an apocalyptic number.

150021645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

150021645 is a deficient number, since it is larger than the sum of its proper divisors (90013011).

150021645 is a wasteful number, since it uses less digits than its factorization.

150021645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001451.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 150021645 is about 12248.3323354651. The cubic root of 150021645 is about 531.3548403007.

Adding to 150021645 its reverse (546120051), we get a palindrome (696141696).

The spelling of 150021645 in words is "one hundred fifty million, twenty-one thousand, six hundred forty-five".