52581492 has 36 divisors (see below), whose sum is σ = 133251300. Its totient is φ = 17482752.

The previous prime is 52581481. The next prime is 52581497. The reversal of 52581492 is 29418525.

It can be written as a sum of positive squares in 2 ways, for example, as 45643536 + 6937956 = 6756^2 + 2634^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52581497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14538 + ... + 17790.

It is an arithmetic number, because the mean of its divisors is an integer number (3701425).

Almost surely, 2^52581492 is an apocalyptic number.

It is an amenable number.

52581492 is an abundant number, since it is smaller than the sum of its proper divisors (80669808).

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

52581492 is a wasteful number, since it uses less digits than its factorization.

52581492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712 (or 3707 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 52581492 is about 7251.3096748105. The cubic root of 52581492 is about 374.6372598988.

The spelling of 52581492 in words is "fifty-two million, five hundred eighty-one thousand, four hundred ninety-two".