145903531 has 2 divisors, whose sum is σ = 145903532. Its totient is φ = 145903530.

The previous prime is 145903523. The next prime is 145903547. The reversal of 145903531 is 135309541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145903531 - 2³ = 145903523 is a prime.

It is a super-2 number, since 2×145903531² = 42575680716535922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145903493 and 145903502.

It is not a weakly prime, because it can be changed into another prime (145903591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72951765 + 72951766.

It is an arithmetic number, because the mean of its divisors is an integer number (72951766).

Almost surely, 2^145903531 is an apocalyptic number.

145903531 is a deficient number, since it is larger than the sum of its proper divisors (1).

145903531 is an equidigital number, since it uses as much as digits as its factorization.

145903531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 145903531 is about 12079.0533983421. The cubic root of 145903531 is about 526.4477422011.

The spelling of 145903531 in words is "one hundred forty-five million, nine hundred three thousand, five hundred thirty-one".