51151379 has 4 divisors (see below), whose sum is σ = 53375376. Its totient is φ = 48927384.

The previous prime is 51151357. The next prime is 51151403. The reversal of 51151379 is 97315115.

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: 97315115 = 5 ⋅19463023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51151379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51151979) 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, 1111964 + ... + 1112009.

It is an arithmetic number, because the mean of its divisors is an integer number (13343844).

Almost surely, 2^51151379 is an apocalyptic number.

51151379 is a deficient number, since it is larger than the sum of its proper divisors (2223997).

51151379 is a wasteful number, since it uses less digits than its factorization.

51151379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223996.

The product of its digits is 4725, while the sum is 32.

The square root of 51151379 is about 7152.0192253657. The cubic root of 51151379 is about 371.2095284779.

The spelling of 51151379 in words is "fifty-one million, one hundred fifty-one thousand, three hundred seventy-nine".