55515603 has 32 divisors (see below), whose sum is σ = 87639552. Its totient is φ = 30816000.

The previous prime is 55515571. The next prime is 55515611. The reversal of 55515603 is 30651555.

It is not a de Polignac number, because 55515603 - 2⁵ = 55515571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55515653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64351 + ... + 65207.

It is an arithmetic number, because the mean of its divisors is an integer number (2738736).

Almost surely, 2^55515603 is an apocalyptic number.

55515603 is a deficient number, since it is larger than the sum of its proper divisors (32123949).

55515603 is a wasteful number, since it uses less digits than its factorization.

55515603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 55515603 is about 7450.8793440774. The cubic root of 55515603 is about 381.4799237305.

The spelling of 55515603 in words is "fifty-five million, five hundred fifteen thousand, six hundred three".