81048291 has 16 divisors (see below), whose sum is σ = 112017408. Its totient is φ = 52070400.

The previous prime is 81048287. The next prime is 81048293. The reversal of 81048291 is 19284018.

It is not a de Polignac number, because 81048291 - 2² = 81048287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81048293) 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, 22206 + ... + 25596.

It is an arithmetic number, because the mean of its divisors is an integer number (7001088).

Almost surely, 2^81048291 is an apocalyptic number.

81048291 is a deficient number, since it is larger than the sum of its proper divisors (30969117).

81048291 is a wasteful number, since it uses less digits than its factorization.

81048291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 81048291 is about 9002.6824335861. The cubic root of 81048291 is about 432.7608387930.

The spelling of 81048291 in words is "eighty-one million, forty-eight thousand, two hundred ninety-one".