145543631 has 8 divisors (see below), whose sum is σ = 150862080. Its totient is φ = 140317848.

The previous prime is 145543627. The next prime is 145543637. The reversal of 145543631 is 136345541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145543631 - 2² = 145543627 is a prime.

It is a super-2 number, since 2×145543631² = 42365897049328322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145543637) 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, 19961 + ... + 26258.

It is an arithmetic number, because the mean of its divisors is an integer number (18857760).

Almost surely, 2^145543631 is an apocalyptic number.

145543631 is a deficient number, since it is larger than the sum of its proper divisors (5318449).

145543631 is an equidigital number, since it uses as much as digits as its factorization.

145543631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46333.

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

The square root of 145543631 is about 12064.1465093889. The cubic root of 145543631 is about 526.0145232054.

The spelling of 145543631 in words is "one hundred forty-five million, five hundred forty-three thousand, six hundred thirty-one".