145552157 has 2 divisors, whose sum is σ = 145552158. Its totient is φ = 145552156.

The previous prime is 145552133. The next prime is 145552163. The reversal of 145552157 is 751255541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119552356 + 25999801 = 10934^2 + 5099^2 .

It is an emirp because it is prime and its reverse (751255541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145552157 - 2⁶ = 145552093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145552457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72776078 + 72776079.

It is an arithmetic number, because the mean of its divisors is an integer number (72776079).

Almost surely, 2^145552157 is an apocalyptic number.

It is an amenable number.

145552157 is a deficient number, since it is larger than the sum of its proper divisors (1).

145552157 is an equidigital number, since it uses as much as digits as its factorization.

145552157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35000, while the sum is 35.

The square root of 145552157 is about 12064.4998653073. The cubic root of 145552157 is about 526.0247943803.

The spelling of 145552157 in words is "one hundred forty-five million, five hundred fifty-two thousand, one hundred fifty-seven".