91430155 has 8 divisors (see below), whose sum is σ = 111515184. Its totient is φ = 71944800.

The previous prime is 91430153. The next prime is 91430161. The reversal of 91430155 is 55103419.

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

It is not a de Polignac number, because 91430155 - 2¹ = 91430153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91430153) 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, 149581 + ... + 150190.

It is an arithmetic number, because the mean of its divisors is an integer number (13939398).

Almost surely, 2^91430155 is an apocalyptic number.

91430155 is a deficient number, since it is larger than the sum of its proper divisors (20085029).

91430155 is a wasteful number, since it uses less digits than its factorization.

91430155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299837.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 91430155 is about 9561.9116812487. The cubic root of 91430155 is about 450.5017530911.

The spelling of 91430155 in words is "ninety-one million, four hundred thirty thousand, one hundred fifty-five".