52146981 has 6 divisors (see below), whose sum is σ = 75323430. Its totient is φ = 34764648.

The previous prime is 52146979. The next prime is 52147019. The reversal of 52146981 is 18964125.

52146981 is a `hidden beast` number, since 521 + 46 + 98 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43678881 + 8468100 = 6609^2 + 2910^2 .

It is not a de Polignac number, because 52146981 - 2¹ = 52146979 is a prime.

It is a super-2 number, since 2×52146981² = 5438615254828722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52146931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2897046 + ... + 2897063.

It is an arithmetic number, because the mean of its divisors is an integer number (12553905).

Almost surely, 2^52146981 is an apocalyptic number.

It is an amenable number.

52146981 is a deficient number, since it is larger than the sum of its proper divisors (23176449).

52146981 is a wasteful number, since it uses less digits than its factorization.

52146981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794115 (or 5794112 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 52146981 is about 7221.2866582071. The cubic root of 52146981 is about 373.6024567981.

The spelling of 52146981 in words is "fifty-two million, one hundred forty-six thousand, nine hundred eighty-one".