50491518 has 64 divisors (see below), whose sum is σ = 126669312. Its totient is φ = 13034880.

The previous prime is 50491501. The next prime is 50491537. The reversal of 50491518 is 81519405.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135180 + ... + 135552.

It is an arithmetic number, because the mean of its divisors is an integer number (1979208).

Almost surely, 2^50491518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50491518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63334656).

50491518 is an abundant number, since it is smaller than the sum of its proper divisors (76177794).

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

50491518 is a wasteful number, since it uses less digits than its factorization.

50491518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 50491518 is about 7105.7383852771. The cubic root of 50491518 is about 369.6063941895.

The spelling of 50491518 in words is "fifty million, four hundred ninety-one thousand, five hundred eighteen".