55551261 has 8 divisors (see below), whose sum is σ = 75466080. Its totient is φ = 36335312.

The previous prime is 55551259. The next prime is 55551277. The reversal of 55551261 is 16215555.

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 55551261 - 2¹ = 55551259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551061) 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, 174531 + ... + 174848.

It is an arithmetic number, because the mean of its divisors is an integer number (9433260).

Almost surely, 2^55551261 is an apocalyptic number.

It is an amenable number.

55551261 is a deficient number, since it is larger than the sum of its proper divisors (19914819).

55551261 is a wasteful number, since it uses less digits than its factorization.

55551261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349435.

The product of its digits is 7500, while the sum is 30.

The square root of 55551261 is about 7453.2718318870. The cubic root of 55551261 is about 381.5615818533.

The spelling of 55551261 in words is "fifty-five million, five hundred fifty-one thousand, two hundred sixty-one".