145431544 has 8 divisors (see below), whose sum is σ = 272684160. Its totient is φ = 72715768.

The previous prime is 145431527. The next prime is 145431557. The reversal of 145431544 is 445134541.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9089464 + ... + 9089479.

It is an arithmetic number, because the mean of its divisors is an integer number (34085520).

Almost surely, 2^145431544 is an apocalyptic number.

It is an amenable number.

145431544 is a deficient number, since it is larger than the sum of its proper divisors (127252616).

145431544 is a wasteful number, since it uses less digits than its factorization.

145431544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18178949 (or 18178945 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 145431544 is about 12059.5001554791. The cubic root of 145431544 is about 525.8794559606.

The spelling of 145431544 in words is "one hundred forty-five million, four hundred thirty-one thousand, five hundred forty-four".