54312309 has 16 divisors (see below), whose sum is σ = 80879040. Its totient is φ = 36020880.

The previous prime is 54312301. The next prime is 54312329. The reversal of 54312309 is 90321345.

It is not a de Polignac number, because 54312309 - 2³ = 54312301 is a prime.

It is a super-2 number, since 2×54312309² = 5899653817822962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54312301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214 + ... + 10424.

It is an arithmetic number, because the mean of its divisors is an integer number (5054940).

Almost surely, 2^54312309 is an apocalyptic number.

It is an amenable number.

54312309 is a deficient number, since it is larger than the sum of its proper divisors (26566731).

54312309 is a wasteful number, since it uses less digits than its factorization.

54312309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10417 (or 10411 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 54312309 is about 7369.6885280180. The cubic root of 54312309 is about 378.7035900393.

The spelling of 54312309 in words is "fifty-four million, three hundred twelve thousand, three hundred nine".