81154630 has 8 divisors (see below), whose sum is σ = 146078352. Its totient is φ = 32461848.

The previous prime is 81154589. The next prime is 81154637. The reversal of 81154630 is 3645118.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81154637) 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, 4057722 + ... + 4057741.

It is an arithmetic number, because the mean of its divisors is an integer number (18259794).

Almost surely, 2^81154630 is an apocalyptic number.

81154630 is a deficient number, since it is larger than the sum of its proper divisors (64923722).

81154630 is a wasteful number, since it uses less digits than its factorization.

81154630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8115470.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 81154630 is about 9008.5864595951. The cubic root of 81154630 is about 432.9500233003.

Adding to 81154630 its reverse (3645118), we get a palindrome (84799748).

The spelling of 81154630 in words is "eighty-one million, one hundred fifty-four thousand, six hundred thirty".