55121253 has 8 divisors (see below), whose sum is σ = 80176416. Its totient is φ = 33406800.

The previous prime is 55121251. The next prime is 55121267. The reversal of 55121253 is 35212155.

It is a happy number.

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

It is not a de Polignac number, because 55121253 - 2¹ = 55121251 is a prime.

It is a super-4 number, since 4×55121253⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

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 in 7 ways as a sum of consecutive naturals, for example, 835138 + ... + 835203.

It is an arithmetic number, because the mean of its divisors is an integer number (10022052).

Almost surely, 2^55121253 is an apocalyptic number.

It is an amenable number.

55121253 is a deficient number, since it is larger than the sum of its proper divisors (25055163).

55121253 is a wasteful number, since it uses less digits than its factorization.

55121253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670355.

The product of its digits is 1500, while the sum is 24.

The square root of 55121253 is about 7424.3688620650. The cubic root of 55121253 is about 380.5745072567.

The spelling of 55121253 in words is "fifty-five million, one hundred twenty-one thousand, two hundred fifty-three".