81130058 has 8 divisors (see below), whose sum is σ = 121993860. Its totient is φ = 40465440.

The previous prime is 81130043. The next prime is 81130073. The reversal of 81130058 is 85003118.

It is an interprime number because it is at equal distance from previous prime (81130043) and next prime (81130073).

It can be written as a sum of positive squares in 2 ways, for example, as 78021889 + 3108169 = 8833^2 + 1763^2 .

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

It is a super-2 number, since 2×81130058² = 13164172622166728, which contains 22 as substring.

It is a Curzon 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, 48773 + ... + 50408.

Almost surely, 2^81130058 is an apocalyptic number.

81130058 is a deficient number, since it is larger than the sum of its proper divisors (40863802).

81130058 is a wasteful number, since it uses less digits than its factorization.

81130058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99592.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 81130058 is about 9007.2225463791. Note that the first 3 decimals coincide. The cubic root of 81130058 is about 432.9063226848.

The spelling of 81130058 in words is "eighty-one million, one hundred thirty thousand, fifty-eight".