91520000 has 220 divisors, whose sum is σ = 268582776. Its totient is φ = 30720000.

The previous prime is 91519957. The next prime is 91520003. The reversal of 91520000 is 2519.

It is a tau number, because it is divible by the number of its divisors (220).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91520003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7039994 + ... + 7040006.

Almost surely, 2^91520000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134291388).

91520000 is an abundant number, since it is smaller than the sum of its proper divisors (177062776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91520000 is a wasteful number, since it uses less digits than its factorization.

91520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 91520000 is about 9566.6085944811. The cubic root of 91520000 is about 450.6492685338.

Adding to 91520000 its reverse (2519), we get a palindrome (91522519).

The spelling of 91520000 in words is "ninety-one million, five hundred twenty thousand".