81292254 has 8 divisors (see below), whose sum is σ = 162584520. Its totient is φ = 27097416.

The previous prime is 81292243. The next prime is 81292259. The reversal of 81292254 is 45229218.

It is a sphenic number, since it is the product of 3 distinct primes.

81292254 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81292259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6774349 + ... + 6774360.

It is an arithmetic number, because the mean of its divisors is an integer number (20323065).

Almost surely, 2^81292254 is an apocalyptic number.

81292254 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81292254 is a wasteful number, since it uses less digits than its factorization.

81292254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13548714.

The product of its digits is 11520, while the sum is 33.

The square root of 81292254 is about 9016.2217142215. The cubic root of 81292254 is about 433.1946208223.

The spelling of 81292254 in words is "eighty-one million, two hundred ninety-two thousand, two hundred fifty-four".