51155404 has 12 divisors (see below), whose sum is σ = 93414384. Its totient is φ = 24465584.

The previous prime is 51155387. The next prime is 51155443. The reversal of 51155404 is 40455115.

It is a happy 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, 277927 + ... + 278110.

It is an arithmetic number, because the mean of its divisors is an integer number (7784532).

Almost surely, 2^51155404 is an apocalyptic number.

It is an amenable number.

51155404 is a deficient number, since it is larger than the sum of its proper divisors (42258980).

51155404 is a wasteful number, since it uses less digits than its factorization.

51155404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556064 (or 556062 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 51155404 is about 7152.3006088950. The cubic root of 51155404 is about 371.2192648017.

The spelling of 51155404 in words is "fifty-one million, one hundred fifty-five thousand, four hundred four".