55516307 has 8 divisors (see below), whose sum is σ = 69215232. Its totient is φ = 43259400.

The previous prime is 55516303. The next prime is 55516343. The reversal of 55516307 is 70361555.

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 55516307 - 2² = 55516303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55516303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360419 + ... + 360572.

It is an arithmetic number, because the mean of its divisors is an integer number (8651904).

Almost surely, 2^55516307 is an apocalyptic number.

55516307 is a deficient number, since it is larger than the sum of its proper divisors (13698925).

55516307 is a wasteful number, since it uses less digits than its factorization.

55516307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721009.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 55516307 is about 7450.9265866736. The cubic root of 55516307 is about 381.4815362546.

It can be divided in two parts, 555 and 16307, that multiplied together give a triangular number (9050385 = T₄₂₅₄).

The spelling of 55516307 in words is "fifty-five million, five hundred sixteen thousand, three hundred seven".