46891581 has 16 divisors (see below), whose sum is σ = 68732928. Its totient is φ = 28199600.

The previous prime is 46891567. The next prime is 46891583. The reversal of 46891581 is 18519864.

46891581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 46891581 - 2²³ = 38502973 is a prime.

It is a super-2 number, since 2×46891581² = 4397640737359122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46891583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1101 + ... + 9746.

It is an arithmetic number, because the mean of its divisors is an integer number (4295808).

Almost surely, 2^46891581 is an apocalyptic number.

It is an amenable number.

46891581 is a deficient number, since it is larger than the sum of its proper divisors (21841347).

46891581 is a wasteful number, since it uses less digits than its factorization.

46891581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10992.

The product of its digits is 69120, while the sum is 42.

The square root of 46891581 is about 6847.7427667809. The cubic root of 46891581 is about 360.6049012364.

It can be divided in two parts, 468915 and 81, that added together give a triangular number (468996 = T₉₆₈).

The spelling of 46891581 in words is "forty-six million, eight hundred ninety-one thousand, five hundred eighty-one".