145506131 has 2 divisors, whose sum is σ = 145506132. Its totient is φ = 145506130.

The previous prime is 145506113. The next prime is 145506139. The reversal of 145506131 is 131605541.

Together with previous prime (145506113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (131605541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145506131 is a prime.

It is a super-2 number, since 2×145506131² = 42344068317178322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145506131.

It is not a weakly prime, because it can be changed into another prime (145506139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72753065 + 72753066.

It is an arithmetic number, because the mean of its divisors is an integer number (72753066).

Almost surely, 2^145506131 is an apocalyptic number.

145506131 is a deficient number, since it is larger than the sum of its proper divisors (1).

145506131 is an equidigital number, since it uses as much as digits as its factorization.

145506131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 145506131 is about 12062.5922172641. The cubic root of 145506131 is about 525.9693426209.

The spelling of 145506131 in words is "one hundred forty-five million, five hundred six thousand, one hundred thirty-one".