55121415 has 8 divisors (see below), whose sum is σ = 88194288. Its totient is φ = 29398080.

The previous prime is 55121401. The next prime is 55121419. The reversal of 55121415 is 51412155.

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

It is not a de Polignac number, because 55121415 - 2⁸ = 55121159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837366 + ... + 1837395.

It is an arithmetic number, because the mean of its divisors is an integer number (11024286).

Almost surely, 2^55121415 is an apocalyptic number.

55121415 is a deficient number, since it is larger than the sum of its proper divisors (33072873).

55121415 is a wasteful number, since it uses less digits than its factorization.

55121415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3674769.

The product of its digits is 1000, while the sum is 24.

The square root of 55121415 is about 7424.3797720752. The cubic root of 55121415 is about 380.5748800893.

The spelling of 55121415 in words is "fifty-five million, one hundred twenty-one thousand, four hundred fifteen".