144536731 has 4 divisors (see below), whose sum is σ = 144575512. Its totient is φ = 144497952.

The previous prime is 144536729. The next prime is 144536753. The reversal of 144536731 is 137635441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144536731 - 2¹ = 144536729 is a prime.

It is a super-2 number, since 2×144536731² = 41781733216332722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144536701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13125 + ... + 21478.

It is an arithmetic number, because the mean of its divisors is an integer number (36143878).

Almost surely, 2^144536731 is an apocalyptic number.

144536731 is a deficient number, since it is larger than the sum of its proper divisors (38781).

144536731 is an equidigital number, since it uses as much as digits as its factorization.

144536731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38780.

The product of its digits is 30240, while the sum is 34.

The square root of 144536731 is about 12022.3429912809. The cubic root of 144536731 is about 524.7986904677.

The spelling of 144536731 in words is "one hundred forty-four million, five hundred thirty-six thousand, seven hundred thirty-one".