55121254 has 4 divisors (see below), whose sum is σ = 82681884. Its totient is φ = 27560626.

The previous prime is 55121251. The next prime is 55121267. The reversal of 55121254 is 45212155.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780312 + ... + 13780315.

It is an arithmetic number, because the mean of its divisors is an integer number (20670471).

Almost surely, 2^55121254 is an apocalyptic number.

55121254 is a deficient number, since it is larger than the sum of its proper divisors (27560630).

55121254 is a wasteful number, since it uses less digits than its factorization.

55121254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27560629.

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

The square root of 55121254 is about 7424.3689294108. The cubic root of 55121254 is about 380.5745095581.

Subtracting from 55121254 its reverse (45212155), we obtain a palindrome (9909099).

The spelling of 55121254 in words is "fifty-five million, one hundred twenty-one thousand, two hundred fifty-four".