102554521 has 4 divisors (see below), whose sum is σ = 102777444. Its totient is φ = 102331600.

The previous prime is 102554513. The next prime is 102554531. The reversal of 102554521 is 125455201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70744921 + 31809600 = 8411^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 102554521 - 2³ = 102554513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102554531) 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, 110770 + ... + 111691.

It is an arithmetic number, because the mean of its divisors is an integer number (25694361).

Almost surely, 2^102554521 is an apocalyptic number.

It is an amenable number.

102554521 is a deficient number, since it is larger than the sum of its proper divisors (222923).

102554521 is an equidigital number, since it uses as much as digits as its factorization.

102554521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222922.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 102554521 is about 10126.9206079637. The cubic root of 102554521 is about 468.0780438795.

The spelling of 102554521 in words is "one hundred two million, five hundred fifty-four thousand, five hundred twenty-one".