91506450 has 48 divisors (see below), whose sum is σ = 259358400. Its totient is φ = 20915520.

The previous prime is 91506431. The next prime is 91506469. The reversal of 91506450 is 5460519.

It is an interprime number because it is at equal distance from previous prime (91506431) and next prime (91506469).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42525 + ... + 44624.

It is an arithmetic number, because the mean of its divisors is an integer number (5403300).

Almost surely, 2^91506450 is an apocalyptic number.

91506450 is an abundant number, since it is smaller than the sum of its proper divisors (167851950).

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

91506450 is a wasteful number, since it uses less digits than its factorization.

91506450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87171 (or 87166 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 91506450 is about 9565.9003758141. The cubic root of 91506450 is about 450.6270271332.

Adding to 91506450 its reverse (5460519), we get a palindrome (96966969).

The spelling of 91506450 in words is "ninety-one million, five hundred six thousand, four hundred fifty".