99958551 has 16 divisors (see below), whose sum is σ = 166165248. Its totient is φ = 51926400.

The previous prime is 99958501. The next prime is 99958553. The reversal of 99958551 is 15585999.

It is a happy number.

It is not a de Polignac number, because 99958551 - 2¹⁰ = 99957527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99958494 and 99958503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99958553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216130 + ... + 216591.

It is an arithmetic number, because the mean of its divisors is an integer number (10385328).

Almost surely, 2^99958551 is an apocalyptic number.

99958551 is a deficient number, since it is larger than the sum of its proper divisors (66206697).

99958551 is a wasteful number, since it uses less digits than its factorization.

99958551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432742.

The product of its digits is 729000, while the sum is 51.

The square root of 99958551 is about 9997.9273352030. The cubic root of 99958551 is about 464.0947447603.

The spelling of 99958551 in words is "ninety-nine million, nine hundred fifty-eight thousand, five hundred fifty-one".