55209703 has 8 divisors (see below), whose sum is σ = 56059200. Its totient is φ = 54364128.

The previous prime is 55209673. The next prime is 55209719. The reversal of 55209703 is 30790255.

It is a happy number.

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 55209703 - 2²¹ = 53112551 is a prime.

It is a super-2 number, since 2×55209703² = 6096222610696418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55209743) 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, 39525 + ... + 40897.

It is an arithmetic number, because the mean of its divisors is an integer number (7007400).

Almost surely, 2^55209703 is an apocalyptic number.

55209703 is a deficient number, since it is larger than the sum of its proper divisors (849497).

55209703 is a wasteful number, since it uses less digits than its factorization.

55209703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 55209703 is about 7430.3232096592. The cubic root of 55209703 is about 380.7779606997. Note that the first 3 decimals are identical.

Adding to 55209703 its reverse (30790255), we get a palindrome (85999958).

The spelling of 55209703 in words is "fifty-five million, two hundred nine thousand, seven hundred three".