145331801 has 4 divisors (see below), whose sum is σ = 145643472. Its totient is φ = 145020132.

The previous prime is 145331773. The next prime is 145331833. The reversal of 145331801 is 108133541.

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 a cyclic number.

It is not a de Polignac number, because 145331801 - 2¹⁰ = 145330777 is a prime.

It is a super-2 number, since 2×145331801² = 42242664763807202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145331881) by changing a digit.

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, 155135 + ... + 156068.

It is an arithmetic number, because the mean of its divisors is an integer number (36410868).

Almost surely, 2^145331801 is an apocalyptic number.

It is an amenable number.

145331801 is a deficient number, since it is larger than the sum of its proper divisors (311671).

145331801 is an equidigital number, since it uses as much as digits as its factorization.

145331801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311670.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 145331801 is about 12055.3639928457. The cubic root of 145331801 is about 525.7592051330.

The spelling of 145331801 in words is "one hundred forty-five million, three hundred thirty-one thousand, eight hundred one".