54145321 has 2 divisors, whose sum is σ = 54145322. Its totient is φ = 54145320.

The previous prime is 54145309. The next prime is 54145331. The reversal of 54145321 is 12354145.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42510400 + 11634921 = 6520^2 + 3411^2 .

It is a cyclic number.

It is not a de Polignac number, because 54145321 - 2¹¹ = 54143273 is a prime.

It is equal to p_3234364 and since 54145321 and 3234364 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (54145331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27072660 + 27072661.

It is an arithmetic number, because the mean of its divisors is an integer number (27072661).

Almost surely, 2^54145321 is an apocalyptic number.

It is an amenable number.

54145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

54145321 is an equidigital number, since it uses as much as digits as its factorization.

54145321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 54145321 is about 7358.3504265562. The cubic root of 54145321 is about 378.3150723568.

Adding to 54145321 its reverse (12354145), we get a palindrome (66499466).

The spelling of 54145321 in words is "fifty-four million, one hundred forty-five thousand, three hundred twenty-one".