56121355 has 4 divisors (see below), whose sum is σ = 67345632. Its totient is φ = 44897080.

The previous prime is 56121349. The next prime is 56121361. The reversal of 56121355 is 55312165.

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

It is an interprime number because it is at equal distance from previous prime (56121349) and next prime (56121361).

It is not a de Polignac number, because 56121355 - 2¹³ = 56113163 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5612131 + ... + 5612140.

It is an arithmetic number, because the mean of its divisors is an integer number (16836408).

Almost surely, 2^56121355 is an apocalyptic number.

56121355 is a deficient number, since it is larger than the sum of its proper divisors (11224277).

56121355 is a wasteful number, since it uses less digits than its factorization.

56121355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11224276.

The product of its digits is 4500, while the sum is 28.

The square root of 56121355 is about 7491.4187574851. The cubic root of 56121355 is about 382.8623987878.

The spelling of 56121355 in words is "fifty-six million, one hundred twenty-one thousand, three hundred fifty-five".