81029052 has 48 divisors (see below), whose sum is σ = 226238880. Its totient is φ = 24931584.

The previous prime is 81029041. The next prime is 81029059. The reversal of 81029052 is 25092018.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81029059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27453 + ... + 30260.

It is an arithmetic number, because the mean of its divisors is an integer number (4713310).

Almost surely, 2^81029052 is an apocalyptic number.

It is an amenable number.

81029052 is an abundant number, since it is smaller than the sum of its proper divisors (145209828).

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

81029052 is a wasteful number, since it uses less digits than its factorization.

81029052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57739 (or 57731 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 81029052 is about 9001.6138553039. The cubic root of 81029052 is about 432.7265935936.

The spelling of 81029052 in words is "eighty-one million, twenty-nine thousand, fifty-two".