143561916 has 24 divisors (see below), whose sum is σ = 372197840. Its totient is φ = 47853936.

The previous prime is 143561909. The next prime is 143561917. The reversal of 143561916 is 619165341.

143561916 is a `hidden beast` number, since 1 + 4 + 3 + 561 + 91 + 6 = 666.

It is a super-2 number, since 2×143561916² = 41220047451182112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143561917) 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 7 ways as a sum of consecutive naturals, for example, 664531 + ... + 664746.

Almost surely, 2^143561916 is an apocalyptic number.

It is an amenable number.

143561916 is an abundant number, since it is smaller than the sum of its proper divisors (228635924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

143561916 is a wasteful number, since it uses less digits than its factorization.

143561916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329290 (or 1329282 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 143561916 is about 11981.7325959145. The cubic root of 143561916 is about 523.6162088794.

The spelling of 143561916 in words is "one hundred forty-three million, five hundred sixty-one thousand, nine hundred sixteen".