52461981 has 24 divisors (see below), whose sum is σ = 89028576. Its totient is φ = 29348640.

The previous prime is 52461979. The next prime is 52461991. The reversal of 52461981 is 18916425.

It is not a de Polignac number, because 52461981 - 2¹ = 52461979 is a prime.

It is a super-2 number, since 2×52461981² = 5504518900888722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52461901) 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, 19095 + ... + 21668.

It is an arithmetic number, because the mean of its divisors is an integer number (3709524).

Almost surely, 2^52461981 is an apocalyptic number.

It is an amenable number.

52461981 is a deficient number, since it is larger than the sum of its proper divisors (36566595).

52461981 is a wasteful number, since it uses less digits than its factorization.

52461981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40793 (or 40790 counting only the distinct ones).

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

The square root of 52461981 is about 7243.0643376958. The cubic root of 52461981 is about 374.3532104100.

It can be divided in two parts, 5246 and 1981, that added together give a palindrome (7227).

The spelling of 52461981 in words is "fifty-two million, four hundred sixty-one thousand, nine hundred eighty-one".