52143981 has 24 divisors (see below), whose sum is σ = 74564160. Its totient is φ = 32404992.

The previous prime is 52143937. The next prime is 52143991. The reversal of 52143981 is 18934125.

It is not a de Polignac number, because 52143981 - 2¹¹ = 52141933 is a prime.

It is a super-2 number, since 2×52143981² = 5437989509056722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52143901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118560 + ... + 118998.

It is an arithmetic number, because the mean of its divisors is an integer number (3106840).

Almost surely, 2^52143981 is an apocalyptic number.

52143981 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52143981 is a deficient number, since it is larger than the sum of its proper divisors (22420179).

52143981 is a wasteful number, since it uses less digits than its factorization.

52143981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 596 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 52143981 is about 7221.0789360040. The cubic root of 52143981 is about 373.5952922487.

The spelling of 52143981 in words is "fifty-two million, one hundred forty-three thousand, nine hundred eighty-one".