145172311 has 2 divisors, whose sum is σ = 145172312. Its totient is φ = 145172310.

The previous prime is 145172263. The next prime is 145172323. The reversal of 145172311 is 113271541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145172311 - 2¹³ = 145164119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145172341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72586155 + 72586156.

It is an arithmetic number, because the mean of its divisors is an integer number (72586156).

Almost surely, 2^145172311 is an apocalyptic number.

145172311 is a deficient number, since it is larger than the sum of its proper divisors (1).

145172311 is an equidigital number, since it uses as much as digits as its factorization.

145172311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 145172311 is about 12048.7472792818. The cubic root of 145172311 is about 525.5668085438.

The spelling of 145172311 in words is "one hundred forty-five million, one hundred seventy-two thousand, three hundred eleven".