55507487 has 16 divisors (see below), whose sum is σ = 66823680. Its totient is φ = 45077472.

The previous prime is 55507471. The next prime is 55507489. The reversal of 55507487 is 78470555.

It is a cyclic number.

It is not a de Polignac number, because 55507487 - 2⁴ = 55507471 is a prime.

It is a super-2 number, since 2×55507487² = 6162162226110338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55507489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15968 + ... + 19130.

It is an arithmetic number, because the mean of its divisors is an integer number (4176480).

Almost surely, 2^55507487 is an apocalyptic number.

55507487 is a deficient number, since it is larger than the sum of its proper divisors (11316193).

55507487 is a wasteful number, since it uses less digits than its factorization.

55507487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 55507487 is about 7450.3346904686. The cubic root of 55507487 is about 381.4613329093.

The spelling of 55507487 in words is "fifty-five million, five hundred seven thousand, four hundred eighty-seven".