145531157 has 2 divisors, whose sum is σ = 145531158. Its totient is φ = 145531156.

The previous prime is 145531153. The next prime is 145531219. The reversal of 145531157 is 751135541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100922116 + 44609041 = 10046^2 + 6679^2 .

It is a cyclic number.

It is not a de Polignac number, because 145531157 - 2² = 145531153 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 (145531151) 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 as a sum of consecutive naturals, namely, 72765578 + 72765579.

It is an arithmetic number, because the mean of its divisors is an integer number (72765579).

Almost surely, 2^145531157 is an apocalyptic number.

It is an amenable number.

145531157 is a deficient number, since it is larger than the sum of its proper divisors (1).

145531157 is an equidigital number, since it uses as much as digits as its factorization.

145531157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10500, while the sum is 32.

The square root of 145531157 is about 12063.6295118841. The cubic root of 145531157 is about 525.9994951973. Note that the first 3 decimals are identical.

Adding to 145531157 its reverse (751135541), we get a palindrome (896666698).

The spelling of 145531157 in words is "one hundred forty-five million, five hundred thirty-one thousand, one hundred fifty-seven".