51397603 has 4 divisors (see below), whose sum is σ = 54102760. Its totient is φ = 48692448.

The previous prime is 51397601. The next prime is 51397607. The reversal of 51397603 is 30679315.

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 51397603 - 2¹ = 51397601 is a prime.

It is a super-3 number, since 3×51397603³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51397601) by changing a digit.

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, 1352550 + ... + 1352587.

It is an arithmetic number, because the mean of its divisors is an integer number (13525690).

Almost surely, 2^51397603 is an apocalyptic number.

51397603 is a deficient number, since it is larger than the sum of its proper divisors (2705157).

51397603 is a wasteful number, since it uses less digits than its factorization.

51397603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705156.

The product of its (nonzero) digits is 17010, while the sum is 34.

The square root of 51397603 is about 7169.2121603423. The cubic root of 51397603 is about 371.8041975508.

The spelling of 51397603 in words is "fifty-one million, three hundred ninety-seven thousand, six hundred three".