51155425 has 24 divisors (see below), whose sum is σ = 66067200. Its totient is φ = 39249600.

The previous prime is 51155387. The next prime is 51155443. The reversal of 51155425 is 52455115.

It is not a de Polignac number, because 51155425 - 2⁷ = 51155297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51155393 and 51155402.

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 23 ways as a sum of consecutive naturals, for example, 115254 + ... + 115696.

It is an arithmetic number, because the mean of its divisors is an integer number (2752800).

Almost surely, 2^51155425 is an apocalyptic number.

It is an amenable number.

51155425 is a deficient number, since it is larger than the sum of its proper divisors (14911775).

51155425 is a wasteful number, since it uses less digits than its factorization.

51155425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 628 counting only the distinct ones).

The product of its digits is 5000, while the sum is 28.

The square root of 51155425 is about 7152.3020769540. The cubic root of 51155425 is about 371.2193155985.

The spelling of 51155425 in words is "fifty-one million, one hundred fifty-five thousand, four hundred twenty-five".