55156403 has 4 divisors (see below), whose sum is σ = 55702608. Its totient is φ = 54610200.

The previous prime is 55156393. The next prime is 55156441. The reversal of 55156403 is 30465155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55156403 - 2⁸ = 55156147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55153403) 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, 272951 + ... + 273152.

It is an arithmetic number, because the mean of its divisors is an integer number (13925652).

Almost surely, 2^55156403 is an apocalyptic number.

55156403 is a deficient number, since it is larger than the sum of its proper divisors (546205).

55156403 is a wasteful number, since it uses less digits than its factorization.

55156403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546204.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55156403 is about 7426.7356893860. The cubic root of 55156403 is about 380.6553856277.

The spelling of 55156403 in words is "fifty-five million, one hundred fifty-six thousand, four hundred three".