55140515 has 8 divisors (see below), whose sum is σ = 67290480. Its totient is φ = 43364512.

The previous prime is 55140493. The next prime is 55140539. The reversal of 55140515 is 51504155.

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 55140515 - 2²² = 50946211 is a prime.

It is an unprimeable number.

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, 93164 + ... + 93753.

It is an arithmetic number, because the mean of its divisors is an integer number (8411310).

Almost surely, 2^55140515 is an apocalyptic number.

55140515 is a deficient number, since it is larger than the sum of its proper divisors (12149965).

55140515 is a wasteful number, since it uses less digits than its factorization.

55140515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186981.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 55140515 is about 7425.6659634002. The cubic root of 55140515 is about 380.6188324007.

It can be divided in two parts, 55140 and 515, that added together give a palindrome (55655).

The spelling of 55140515 in words is "fifty-five million, one hundred forty thousand, five hundred fifteen".