145333251 has 64 divisors (see below), whose sum is σ = 261120000. Its totient is φ = 78094368.

The previous prime is 145333241. The next prime is 145333273. The reversal of 145333251 is 152333541.

It is not a de Polignac number, because 145333251 - 2¹⁰ = 145332227 is a prime.

It is a super-2 number, since 2×145333251² = 42243507692458002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (145333211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 291000 + ... + 291498.

It is an arithmetic number, because the mean of its divisors is an integer number (4080000).

Almost surely, 2^145333251 is an apocalyptic number.

145333251 is a deficient number, since it is larger than the sum of its proper divisors (115786749).

145333251 is a wasteful number, since it uses less digits than its factorization.

145333251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 599 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 145333251 is about 12055.4241319001. The cubic root of 145333251 is about 525.7609536567.

Adding to 145333251 its reverse (152333541), we get a palindrome (297666792).

The spelling of 145333251 in words is "one hundred forty-five million, three hundred thirty-three thousand, two hundred fifty-one".