145271531 has 2 divisors, whose sum is σ = 145271532. Its totient is φ = 145271530.

The previous prime is 145271491. The next prime is 145271551. The reversal of 145271531 is 135172541.

145271531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145271531 - 2¹⁴ = 145255147 is a prime.

It is a super-2 number, since 2×145271531² = 42207635438167922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145271494 and 145271503.

It is not a weakly prime, because it can be changed into another prime (145271551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72635765 + 72635766.

It is an arithmetic number, because the mean of its divisors is an integer number (72635766).

Almost surely, 2^145271531 is an apocalyptic number.

145271531 is a deficient number, since it is larger than the sum of its proper divisors (1).

145271531 is an equidigital number, since it uses as much as digits as its factorization.

145271531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 145271531 is about 12052.8640164900. The cubic root of 145271531 is about 525.6865165486.

The spelling of 145271531 in words is "one hundred forty-five million, two hundred seventy-one thousand, five hundred thirty-one".