145562251 has 2 divisors, whose sum is σ = 145562252. Its totient is φ = 145562250.

The previous prime is 145562237. The next prime is 145562273. The reversal of 145562251 is 152265541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145562251 - 2⁹ = 145561739 is a prime.

It is not a weakly prime, because it can be changed into another prime (145562201) 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 as a sum of consecutive naturals, namely, 72781125 + 72781126.

It is an arithmetic number, because the mean of its divisors is an integer number (72781126).

Almost surely, 2^145562251 is an apocalyptic number.

145562251 is a deficient number, since it is larger than the sum of its proper divisors (1).

145562251 is an equidigital number, since it uses as much as digits as its factorization.

145562251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 145562251 is about 12064.9181928432. The cubic root of 145562251 is about 526.0369539883.

It can be divided in two parts, 14556 and 2251, that added together give a 5-th power (16807 = 7⁵).

The spelling of 145562251 in words is "one hundred forty-five million, five hundred sixty-two thousand, two hundred fifty-one".