150399021 has 4 divisors (see below), whose sum is σ = 200532032. Its totient is φ = 100266012.

The previous prime is 150399019. The next prime is 150399023. The reversal of 150399021 is 120993051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (150399019) and next prime (150399023).

It is not a de Polignac number, because 150399021 - 2¹ = 150399019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 150399021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150399023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25066501 + ... + 25066506.

It is an arithmetic number, because the mean of its divisors is an integer number (50133008).

Almost surely, 2^150399021 is an apocalyptic number.

It is an amenable number.

150399021 is a deficient number, since it is larger than the sum of its proper divisors (50133011).

150399021 is an equidigital number, since it uses as much as digits as its factorization.

150399021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50133010.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 150399021 is about 12263.7278590158. The cubic root of 150399021 is about 531.8000042054.

It can be divided in two parts, 150 and 399021, that added together give a triangular number (399171 = T₈₉₃).

The spelling of 150399021 in words is "one hundred fifty million, three hundred ninety-nine thousand, twenty-one".