152320403 has 4 divisors (see below), whose sum is σ = 153255048. Its totient is φ = 151385760.

The previous prime is 152320387. The next prime is 152320409. The reversal of 152320403 is 304023251.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304023251 = 7 ⋅43431893.

It is a cyclic number.

It is not a de Polignac number, because 152320403 - 2⁴ = 152320387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152320409) 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, 467078 + ... + 467403.

It is an arithmetic number, because the mean of its divisors is an integer number (38313762).

Almost surely, 2^152320403 is an apocalyptic number.

152320403 is a deficient number, since it is larger than the sum of its proper divisors (934645).

152320403 is an equidigital number, since it uses as much as digits as its factorization.

152320403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934644.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 152320403 is about 12341.8152230537. The cubic root of 152320403 is about 534.0550507381.

Adding to 152320403 its reverse (304023251), we get a palindrome (456343654).

The spelling of 152320403 in words is "one hundred fifty-two million, three hundred twenty thousand, four hundred three".