58197981 has 8 divisors (see below), whose sum is σ = 80971200. Its totient is φ = 37111712.

The previous prime is 58197973. The next prime is 58197989. The reversal of 58197981 is 18979185.

It is an interprime number because it is at equal distance from previous prime (58197973) and next prime (58197989).

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

It is a cyclic number.

It is not a de Polignac number, because 58197981 - 2³ = 58197973 is a prime.

It is a super-2 number, since 2×58197981² = 6774009984952722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 58197981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58197989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421656 + ... + 421793.

It is an arithmetic number, because the mean of its divisors is an integer number (10121400).

Almost surely, 2^58197981 is an apocalyptic number.

It is an amenable number.

58197981 is a deficient number, since it is larger than the sum of its proper divisors (22773219).

58197981 is a wasteful number, since it uses less digits than its factorization.

58197981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843475.

The product of its digits is 181440, while the sum is 48.

The square root of 58197981 is about 7628.7601220644. The cubic root of 58197981 is about 387.5276006702.

Subtracting from 58197981 its reverse (18979185), we obtain a triangular number (39218796 = T₈₈₅₆).

The spelling of 58197981 in words is "fifty-eight million, one hundred ninety-seven thousand, nine hundred eighty-one".