51357755 has 4 divisors (see below), whose sum is σ = 61629312. Its totient is φ = 41086200.

The previous prime is 51357751. The next prime is 51357769. The reversal of 51357755 is 55775315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55775315 = 5 ⋅11155063.

It is not a de Polignac number, because 51357755 - 2² = 51357751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51357751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5135771 + ... + 5135780.

It is an arithmetic number, because the mean of its divisors is an integer number (15407328).

Almost surely, 2^51357755 is an apocalyptic number.

51357755 is a deficient number, since it is larger than the sum of its proper divisors (10271557).

51357755 is a wasteful number, since it uses less digits than its factorization.

51357755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271556.

The product of its digits is 91875, while the sum is 38.

The square root of 51357755 is about 7166.4325155547. The cubic root of 51357755 is about 371.7080874649.

The spelling of 51357755 in words is "fifty-one million, three hundred fifty-seven thousand, seven hundred fifty-five".