145052331 has 4 divisors (see below), whose sum is σ = 193403112. Its totient is φ = 96701552.

The previous prime is 145052309. The next prime is 145052339. The reversal of 145052331 is 133250541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133250541 = 3 ⋅44416847.

It is a cyclic number.

It is not a de Polignac number, because 145052331 - 2¹³ = 145044139 is a prime.

It is a super-2 number, since 2×145052331² = 42080357457067122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145052339) 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, 24175386 + ... + 24175391.

It is an arithmetic number, because the mean of its divisors is an integer number (48350778).

Almost surely, 2^145052331 is an apocalyptic number.

145052331 is a deficient number, since it is larger than the sum of its proper divisors (48350781).

145052331 is an equidigital number, since it uses as much as digits as its factorization.

145052331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48350780.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 145052331 is about 12043.7673092766. The cubic root of 145052331 is about 525.4219809136.

It can be divided in two parts, 14505 and 2331, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 145052331 in words is "one hundred forty-five million, fifty-two thousand, three hundred thirty-one".