51148279 has 16 divisors (see below), whose sum is σ = 64491840. Its totient is φ = 39479040.

The previous prime is 51148277. The next prime is 51148283. The reversal of 51148279 is 97284115.

It is a cyclic number.

It is not a de Polignac number, because 51148279 - 2¹ = 51148277 is a prime.

It is a super-2 number, since 2×51148279² = 5232292889323682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51148271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3124 + ... + 10585.

It is an arithmetic number, because the mean of its divisors is an integer number (4030740).

Almost surely, 2^51148279 is an apocalyptic number.

51148279 is a deficient number, since it is larger than the sum of its proper divisors (13343561).

51148279 is a wasteful number, since it uses less digits than its factorization.

51148279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770.

The product of its digits is 20160, while the sum is 37.

The square root of 51148279 is about 7151.8025000695. The cubic root of 51148279 is about 371.2020293462.

The spelling of 51148279 in words is "fifty-one million, one hundred forty-eight thousand, two hundred seventy-nine".