55521151 has 8 divisors (see below), whose sum is σ = 64107680. Its totient is φ = 47098368.

The previous prime is 55521143. The next prime is 55521161. The reversal of 55521151 is 15112555.

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

It is a cyclic number.

It is not a de Polignac number, because 55521151 - 2³ = 55521143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55521131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40206 + ... + 41563.

It is an arithmetic number, because the mean of its divisors is an integer number (8013460).

Almost surely, 2^55521151 is an apocalyptic number.

55521151 is a deficient number, since it is larger than the sum of its proper divisors (8586529).

55521151 is an equidigital number, since it uses as much as digits as its factorization.

55521151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81873.

The product of its digits is 1250, while the sum is 25.

The square root of 55521151 is about 7451.2516398254. The cubic root of 55521151 is about 381.4926311497.

The spelling of 55521151 in words is "fifty-five million, five hundred twenty-one thousand, one hundred fifty-one".