55391716 has 6 divisors (see below), whose sum is σ = 96935510. Its totient is φ = 27695856.

The previous prime is 55391671. The next prime is 55391723. The reversal of 55391716 is 61719355.

It can be written as a sum of positive squares in only one way, i.e., 51065316 + 4326400 = 7146^2 + 2080^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6923961 + ... + 6923968.

Almost surely, 2^55391716 is an apocalyptic number.

It is an amenable number.

55391716 is a deficient number, since it is larger than the sum of its proper divisors (41543794).

55391716 is a wasteful number, since it uses less digits than its factorization.

55391716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13847933 (or 13847931 counting only the distinct ones).

The product of its digits is 28350, while the sum is 37.

The square root of 55391716 is about 7442.5611183248. The cubic root of 55391716 is about 381.1959458974.

The spelling of 55391716 in words is "fifty-five million, three hundred ninety-one thousand, seven hundred sixteen".