55121263 has 8 divisors (see below), whose sum is σ = 55858176. Its totient is φ = 54389400.

The previous prime is 55121251. The next prime is 55121267. The reversal of 55121263 is 36212155.

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 55121263 - 2¹⁷ = 54990191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121267) 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, 23920 + ... + 26122.

It is an arithmetic number, because the mean of its divisors is an integer number (6982272).

Almost surely, 2^55121263 is an apocalyptic number.

55121263 is a deficient number, since it is larger than the sum of its proper divisors (736913).

55121263 is a wasteful number, since it uses less digits than its factorization.

55121263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525.

The product of its digits is 1800, while the sum is 25.

The square root of 55121263 is about 7424.3695355229. The cubic root of 55121263 is about 380.5745302711.

The spelling of 55121263 in words is "fifty-five million, one hundred twenty-one thousand, two hundred sixty-three".