51357945 has 8 divisors (see below), whose sum is σ = 82172736. Its totient is φ = 27390896.

The previous prime is 51357941. The next prime is 51357947. The reversal of 51357945 is 54975315.

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

It is a cyclic number.

It is not a de Polignac number, because 51357945 - 2² = 51357941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51357941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711917 + ... + 1711946.

It is an arithmetic number, because the mean of its divisors is an integer number (10271592).

Almost surely, 2^51357945 is an apocalyptic number.

It is an amenable number.

51357945 is a deficient number, since it is larger than the sum of its proper divisors (30814791).

51357945 is a wasteful number, since it uses less digits than its factorization.

51357945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423871.

The product of its digits is 94500, while the sum is 39.

The square root of 51357945 is about 7166.4457717895. The cubic root of 51357945 is about 371.7085458472.

The spelling of 51357945 in words is "fifty-one million, three hundred fifty-seven thousand, nine hundred forty-five".