145346531 has 8 divisors (see below), whose sum is σ = 159871728. Its totient is φ = 132132000.

The previous prime is 145346527. The next prime is 145346533. The reversal of 145346531 is 135643541.

It is not a de Polignac number, because 145346531 - 2² = 145346527 is a prime.

It is a super-2 number, since 2×145346531² = 42251228147467922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145346533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53270 + ... + 55931.

It is an arithmetic number, because the mean of its divisors is an integer number (19983966).

Almost surely, 2^145346531 is an apocalyptic number.

145346531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145346531 is a deficient number, since it is larger than the sum of its proper divisors (14525197).

145346531 is an equidigital number, since it uses as much as digits as its factorization.

145346531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109234 (or 109212 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 145346531 is about 12055.9749087330. The cubic root of 145346531 is about 525.7769671814.

The spelling of 145346531 in words is "one hundred forty-five million, three hundred forty-six thousand, five hundred thirty-one".