51154149 has 4 divisors (see below), whose sum is σ = 68205536. Its totient is φ = 34102764.

The previous prime is 51154111. The next prime is 51154157. The reversal of 51154149 is 94145115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51154149 - 2⁷ = 51154021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51154109) 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, 8525689 + ... + 8525694.

It is an arithmetic number, because the mean of its divisors is an integer number (17051384).

Almost surely, 2^51154149 is an apocalyptic number.

It is an amenable number.

51154149 is a deficient number, since it is larger than the sum of its proper divisors (17051387).

51154149 is a wasteful number, since it uses less digits than its factorization.

51154149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17051386.

The product of its digits is 3600, while the sum is 30.

The square root of 51154149 is about 7152.2128743487. The cubic root of 51154149 is about 371.2162290586.

The spelling of 51154149 in words is "fifty-one million, one hundred fifty-four thousand, one hundred forty-nine".