143357981 has 16 divisors (see below), whose sum is σ = 160677888. Its totient is φ = 127008000.

The previous prime is 143357971. The next prime is 143357987. The reversal of 143357981 is 189753341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143357981 is a prime.

It is a super-2 number, since 2×143357981² = 41103021432792722, 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 (143357987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49781 + ... + 52581.

It is an arithmetic number, because the mean of its divisors is an integer number (10042368).

Almost surely, 2^143357981 is an apocalyptic number.

It is an amenable number.

143357981 is a deficient number, since it is larger than the sum of its proper divisors (17319907).

143357981 is a wasteful number, since it uses less digits than its factorization.

143357981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972.

The product of its digits is 90720, while the sum is 41.

The square root of 143357981 is about 11973.2193248098. The cubic root of 143357981 is about 523.3681526682.

The spelling of 143357981 in words is "one hundred forty-three million, three hundred fifty-seven thousand, nine hundred eighty-one".