145505131 has 2 divisors, whose sum is σ = 145505132. Its totient is φ = 145505130.

The previous prime is 145505119. The next prime is 145505149. The reversal of 145505131 is 131505541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145505131 - 2¹⁵ = 145472363 is a prime.

It is a super-2 number, since 2×145505131² = 42343486294654322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145505096 and 145505105.

It is not a weakly prime, because it can be changed into another prime (145505161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72752565 + 72752566.

It is an arithmetic number, because the mean of its divisors is an integer number (72752566).

Almost surely, 2^145505131 is an apocalyptic number.

145505131 is a deficient number, since it is larger than the sum of its proper divisors (1).

145505131 is an equidigital number, since it uses as much as digits as its factorization.

145505131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 145505131 is about 12062.5507667325. The cubic root of 145505131 is about 525.9681376990.

The spelling of 145505131 in words is "one hundred forty-five million, five hundred five thousand, one hundred thirty-one".