81461230 has 16 divisors (see below), whose sum is σ = 149035104. Its totient is φ = 32050080.

The previous prime is 81461209. The next prime is 81461243. The reversal of 81461230 is 3216418.

It is a super-2 number, since 2×81461230² = 13271863986225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81461195 and 81461204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66162 + ... + 67381.

It is an arithmetic number, because the mean of its divisors is an integer number (9314694).

Almost surely, 2^81461230 is an apocalyptic number.

81461230 is a deficient number, since it is larger than the sum of its proper divisors (67573874).

81461230 is a wasteful number, since it uses less digits than its factorization.

81461230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133611.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 81461230 is about 9025.5875155028. The cubic root of 81461230 is about 433.4945626211.

Adding to 81461230 its reverse (3216418), we get a palindrome (84677648).

The spelling of 81461230 in words is "eighty-one million, four hundred sixty-one thousand, two hundred thirty".