55523515 has 4 divisors (see below), whose sum is σ = 66628224. Its totient is φ = 44418808.

The previous prime is 55523467. The next prime is 55523527. The reversal of 55523515 is 51532555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51532555 = 5 ⋅10306511.

It is a cyclic number.

It is not a de Polignac number, because 55523515 - 2¹¹ = 55521467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5552347 + ... + 5552356.

It is an arithmetic number, because the mean of its divisors is an integer number (16657056).

Almost surely, 2^55523515 is an apocalyptic number.

55523515 is a deficient number, since it is larger than the sum of its proper divisors (11104709).

55523515 is a wasteful number, since it uses less digits than its factorization.

55523515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11104708.

The product of its digits is 18750, while the sum is 31.

The square root of 55523515 is about 7451.4102692041. The cubic root of 55523515 is about 381.4980455174.

The spelling of 55523515 in words is "fifty-five million, five hundred twenty-three thousand, five hundred fifteen".