51555406 has 16 divisors (see below), whose sum is σ = 88504416. Its totient is φ = 22064256.

The previous prime is 51555389. The next prime is 51555419. The reversal of 51555406 is 60455515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9850 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (5531526).

Almost surely, 2^51555406 is an apocalyptic number.

51555406 is a deficient number, since it is larger than the sum of its proper divisors (36949010).

51555406 is a wasteful number, since it uses less digits than its factorization.

51555406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 51555406 is about 7180.2093284249. The cubic root of 51555406 is about 372.1843182247.

The spelling of 51555406 in words is "fifty-one million, five hundred fifty-five thousand, four hundred six".