54972321 has 8 divisors (see below), whose sum is σ = 73353504. Its totient is φ = 36619680.

The previous prime is 54972287. The next prime is 54972329. The reversal of 54972321 is 12327945.

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

It is not a de Polignac number, because 54972321 - 2⁶ = 54972257 is a prime.

It is a super-2 number, since 2×54972321² = 6043912152254082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (54972329) 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, 2140 + ... + 10701.

It is an arithmetic number, because the mean of its divisors is an integer number (9169188).

Almost surely, 2^54972321 is an apocalyptic number.

54972321 is the 4281-st octagonal number.

It is an amenable number.

54972321 is a deficient number, since it is larger than the sum of its proper divisors (18381183).

54972321 is a wasteful number, since it uses less digits than its factorization.

54972321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271.

The product of its digits is 15120, while the sum is 33.

The square root of 54972321 is about 7414.3321344542. The cubic root of 54972321 is about 380.2314402677.

The spelling of 54972321 in words is "fifty-four million, nine hundred seventy-two thousand, three hundred twenty-one".