152303021 has 4 divisors (see below), whose sum is σ = 164018652. Its totient is φ = 140587392.

The previous prime is 152302981. The next prime is 152303027. The reversal of 152303021 is 120303251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120303251 = 1583 ⋅75997.

It can be written as a sum of positive squares in 2 ways, for example, as 13322500 + 138980521 = 3650^2 + 11789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152303021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152303027) 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, 5857796 + ... + 5857821.

It is an arithmetic number, because the mean of its divisors is an integer number (41004663).

Almost surely, 2^152303021 is an apocalyptic number.

It is an amenable number.

152303021 is a deficient number, since it is larger than the sum of its proper divisors (11715631).

152303021 is a wasteful number, since it uses less digits than its factorization.

152303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11715630.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 152303021 is about 12341.1110115743. Note that the first 3 decimals coincide. The cubic root of 152303021 is about 534.0347354513.

Adding to 152303021 its reverse (120303251), we get a palindrome (272606272).

The spelling of 152303021 in words is "one hundred fifty-two million, three hundred three thousand, twenty-one".