55121315 has 8 divisors (see below), whose sum is σ = 68426640. Its totient is φ = 42576352.

The previous prime is 55121273. The next prime is 55121359. The reversal of 55121315 is 51312155.

It is a happy number.

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 55121315 - 2⁶ = 55121251 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189929 + ... + 190218.

It is an arithmetic number, because the mean of its divisors is an integer number (8553330).

Almost surely, 2^55121315 is an apocalyptic number.

55121315 is a deficient number, since it is larger than the sum of its proper divisors (13305325).

55121315 is a wasteful number, since it uses less digits than its factorization.

55121315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380181.

The product of its digits is 750, while the sum is 23.

The square root of 55121315 is about 7424.3730375029. The cubic root of 55121315 is about 380.5746499458.

The spelling of 55121315 in words is "fifty-five million, one hundred twenty-one thousand, three hundred fifteen".