81430430 has 8 divisors (see below), whose sum is σ = 146574792. Its totient is φ = 32572168.

The previous prime is 81430421. The next prime is 81430441. The reversal of 81430430 is 3403418.

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

It is a junction number, because it is equal to n+sod(n) for n = 81430396 and 81430405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4071512 + ... + 4071531.

It is an arithmetic number, because the mean of its divisors is an integer number (18321849).

Almost surely, 2^81430430 is an apocalyptic number.

81430430 is a deficient number, since it is larger than the sum of its proper divisors (65144362).

81430430 is a wasteful number, since it uses less digits than its factorization.

81430430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8143050.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 81430430 is about 9023.8810940748. The cubic root of 81430430 is about 433.4399218404.

Adding to 81430430 its reverse (3403418), we get a palindrome (84833848).

The spelling of 81430430 in words is "eighty-one million, four hundred thirty thousand, four hundred thirty".