81470952 has 48 divisors (see below), whose sum is σ = 221214240. Its totient is φ = 27087648.

The previous prime is 81470951. The next prime is 81470957. The reversal of 81470952 is 25907418.

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

It is not an unprimeable number, because it can be changed into a prime (81470951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32413 + ... + 34835.

It is an arithmetic number, because the mean of its divisors is an integer number (4608630).

Almost surely, 2^81470952 is an apocalyptic number.

It is an amenable number.

81470952 is an abundant number, since it is smaller than the sum of its proper divisors (139743288).

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

81470952 is a wasteful number, since it uses less digits than its factorization.

81470952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 81470952 is about 9026.1260793322. The cubic root of 81470952 is about 433.5118070881.

The spelling of 81470952 in words is "eighty-one million, four hundred seventy thousand, nine hundred fifty-two".