145542731 has 2 divisors, whose sum is σ = 145542732. Its totient is φ = 145542730.

The previous prime is 145542721. The next prime is 145542739. The reversal of 145542731 is 137245541.

145542731 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 an emirp because it is prime and its reverse (137245541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145542731 - 2⁶ = 145542667 is a prime.

It is a super-2 number, since 2×145542731² = 42365373093876722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145542739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72771365 + 72771366.

It is an arithmetic number, because the mean of its divisors is an integer number (72771366).

Almost surely, 2^145542731 is an apocalyptic number.

145542731 is a deficient number, since it is larger than the sum of its proper divisors (1).

145542731 is an equidigital number, since it uses as much as digits as its factorization.

145542731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 145542731 is about 12064.1092087232. The cubic root of 145542731 is about 526.0134389623.

The spelling of 145542731 in words is "one hundred forty-five million, five hundred forty-two thousand, seven hundred thirty-one".