81050432 has 14 divisors (see below), whose sum is σ = 160834578. Its totient is φ = 40525184.

The previous prime is 81050423. The next prime is 81050443. The reversal of 81050432 is 23405018.

It can be written as a sum of positive squares in only one way, i.e., 74373376 + 6677056 = 8624^2 + 2584^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81050398 and 81050407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633143 + ... + 633270.

Almost surely, 2^81050432 is an apocalyptic number.

It is an amenable number.

81050432 is a deficient number, since it is larger than the sum of its proper divisors (79784146).

81050432 is a wasteful number, since it uses less digits than its factorization.

81050432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266425 (or 1266415 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 81050432 is about 9002.8013418047. The cubic root of 81050432 is about 432.7646494133.

The spelling of 81050432 in words is "eighty-one million, fifty thousand, four hundred thirty-two".