54102021551 has 4 divisors (see below), whose sum is σ = 54117408072. Its totient is φ = 54086635032.

The previous prime is 54102021511. The next prime is 54102021577. The reversal of 54102021551 is 15512020145.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54102021551 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 54102021551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54102021511) 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, 7687985 + ... + 7695018.

It is an arithmetic number, because the mean of its divisors is an integer number (13529352018).

Almost surely, 2^54102021551 is an apocalyptic number.

54102021551 is a deficient number, since it is larger than the sum of its proper divisors (15386521).

54102021551 is a wasteful number, since it uses less digits than its factorization.

54102021551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15386520.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 54102021551 its reverse (15512020145), we get a palindrome (69614041696).

The spelling of 54102021551 in words is "fifty-four billion, one hundred two million, twenty-one thousand, five hundred fifty-one".