51155545 has 8 divisors (see below), whose sum is σ = 70156224. Its totient is φ = 35078064.

The previous prime is 51155539. The next prime is 51155551. The reversal of 51155545 is 54555115.

It is an interprime number because it is at equal distance from previous prime (51155539) and next prime (51155551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51155545 - 2⁹ = 51155033 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 7 ways as a sum of consecutive naturals, for example, 730759 + ... + 730828.

It is an arithmetic number, because the mean of its divisors is an integer number (8769528).

Almost surely, 2^51155545 is an apocalyptic number.

It is an amenable number.

51155545 is a deficient number, since it is larger than the sum of its proper divisors (19000679).

51155545 is a wasteful number, since it uses less digits than its factorization.

51155545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461599.

The product of its digits is 12500, while the sum is 31.

The square root of 51155545 is about 7152.3104658565. The cubic root of 51155545 is about 371.2196058661.

The spelling of 51155545 in words is "fifty-one million, one hundred fifty-five thousand, five hundred forty-five".