55087505 has 16 divisors (see below), whose sum is σ = 72261504. Its totient is φ = 39982080.

The previous prime is 55087471. The next prime is 55087519. The reversal of 55087505 is 50578055.

It is not a de Polignac number, because 55087505 - 2¹² = 55083409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44657 + ... + 45873.

It is an arithmetic number, because the mean of its divisors is an integer number (4516344).

Almost surely, 2^55087505 is an apocalyptic number.

55087505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55087505 is a deficient number, since it is larger than the sum of its proper divisors (17173999).

55087505 is a wasteful number, since it uses less digits than its factorization.

55087505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 35000, while the sum is 35.

The square root of 55087505 is about 7422.0957282967. The cubic root of 55087505 is about 380.4968224567.

The spelling of 55087505 in words is "fifty-five million, eighty-seven thousand, five hundred five".