55691801 has 4 divisors (see below), whose sum is σ = 60754704. Its totient is φ = 50628900.

The previous prime is 55691789. The next prime is 55691821. The reversal of 55691801 is 10819655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55691801 - 2⁶ = 55691737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55691821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2531435 + ... + 2531456.

It is an arithmetic number, because the mean of its divisors is an integer number (15188676).

Almost surely, 2^55691801 is an apocalyptic number.

It is an amenable number.

55691801 is a deficient number, since it is larger than the sum of its proper divisors (5062903).

55691801 is a wasteful number, since it uses less digits than its factorization.

55691801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062902.

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 55691801 is about 7462.6939505784. The cubic root of 55691801 is about 381.8830837433.

The spelling of 55691801 in words is "fifty-five million, six hundred ninety-one thousand, eight hundred one".