81054925 has 48 divisors (see below), whose sum is σ = 120881152. Its totient is φ = 52747200.

The previous prime is 81054899. The next prime is 81054937. The reversal of 81054925 is 52945018.

It is not a de Polignac number, because 81054925 - 2¹⁷ = 80923853 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 363364 + ... + 363586.

Almost surely, 2^81054925 is an apocalyptic number.

It is an amenable number.

81054925 is a deficient number, since it is larger than the sum of its proper divisors (39826227).

81054925 is a wasteful number, since it uses less digits than its factorization.

81054925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 81054925 is about 9003.0508717879. The cubic root of 81054925 is about 432.7726459804.

The spelling of 81054925 in words is "eighty-one million, fifty-four thousand, nine hundred twenty-five".