51494159 has 4 divisors (see below), whose sum is σ = 51514320. Its totient is φ = 51474000.

The previous prime is 51494119. The next prime is 51494167. The reversal of 51494159 is 95149415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95149415 = 5 ⋅19029883.

It is a cyclic number.

It is not a de Polignac number, because 51494159 - 2¹² = 51490063 is a prime.

It is a super-2 number, since 2×51494159² = 5303296822234562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51494119) 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, 5579 + ... + 11580.

It is an arithmetic number, because the mean of its divisors is an integer number (12878580).

Almost surely, 2^51494159 is an apocalyptic number.

51494159 is a deficient number, since it is larger than the sum of its proper divisors (20161).

51494159 is a wasteful number, since it uses less digits than its factorization.

51494159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20160.

The product of its digits is 32400, while the sum is 38.

The square root of 51494159 is about 7175.9430739102. The cubic root of 51494159 is about 372.0368768121.

The spelling of 51494159 in words is "fifty-one million, four hundred ninety-four thousand, one hundred fifty-nine".