54513991 has 8 divisors (see below), whose sum is σ = 63155744. Its totient is φ = 46085760.

The previous prime is 54513973. The next prime is 54514001. The reversal of 54513991 is 19931545.

It is a happy number.

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

It is not a de Polignac number, because 54513991 - 2⁷ = 54513863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54513991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54513961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52830 + ... + 53851.

It is an arithmetic number, because the mean of its divisors is an integer number (7894468).

Almost surely, 2^54513991 is an apocalyptic number.

54513991 is a deficient number, since it is larger than the sum of its proper divisors (8641753).

54513991 is a wasteful number, since it uses less digits than its factorization.

54513991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106761.

The product of its digits is 24300, while the sum is 37.

The square root of 54513991 is about 7383.3590593984. The cubic root of 54513991 is about 379.1717672273.

The spelling of 54513991 in words is "fifty-four million, five hundred thirteen thousand, nine hundred ninety-one".