53491918 has 8 divisors (see below), whose sum is σ = 81337248. Its totient is φ = 26379504.

The previous prime is 53491913. The next prime is 53491931. The reversal of 53491918 is 81919435.

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

It is a super-2 number, since 2×53491918² = 5722770582637448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53491913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183046 + ... + 183337.

It is an arithmetic number, because the mean of its divisors is an integer number (10167156).

Almost surely, 2^53491918 is an apocalyptic number.

53491918 is a deficient number, since it is larger than the sum of its proper divisors (27845330).

53491918 is a wasteful number, since it uses less digits than its factorization.

53491918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366458.

The product of its digits is 38880, while the sum is 40.

The square root of 53491918 is about 7313.8169241512. The cubic root of 53491918 is about 376.7871270900.

The spelling of 53491918 in words is "fifty-three million, four hundred ninety-one thousand, nine hundred eighteen".