55403293 has 8 divisors (see below), whose sum is σ = 62390016. Its totient is φ = 48741600.

The previous prime is 55403287. The next prime is 55403321. The reversal of 55403293 is 39230455.

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 55403293 - 2⁵ = 55403261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55403233) 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, 80896 + ... + 81577.

It is an arithmetic number, because the mean of its divisors is an integer number (7798752).

Almost surely, 2^55403293 is an apocalyptic number.

It is an amenable number.

55403293 is a deficient number, since it is larger than the sum of its proper divisors (6986723).

55403293 is a wasteful number, since it uses less digits than its factorization.

55403293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162515.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 55403293 is about 7443.3388341523. The cubic root of 55403293 is about 381.2225009997. Note that the first 3 decimals are identical.

It can be divided in two parts, 55403 and 293, that added together give a square (55696 = 236²).

The spelling of 55403293 in words is "fifty-five million, four hundred three thousand, two hundred ninety-three".