51544197 has 6 divisors (see below), whose sum is σ = 74452742. Its totient is φ = 34362792.

The previous prime is 51544189. The next prime is 51544201. The reversal of 51544197 is 79144515.

It can be written as a sum of positive squares in only one way, i.e., 45239076 + 6305121 = 6726^2 + 2511^2 .

It is not a de Polignac number, because 51544197 - 2³ = 51544189 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 (51544897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2863558 + ... + 2863575.

Almost surely, 2^51544197 is an apocalyptic number.

It is an amenable number.

51544197 is a deficient number, since it is larger than the sum of its proper divisors (22908545).

51544197 is a wasteful number, since it uses less digits than its factorization.

51544197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5727139 (or 5727136 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 51544197 is about 7179.4287377200. The cubic root of 51544197 is about 372.1573432560.

The spelling of 51544197 in words is "fifty-one million, five hundred forty-four thousand, one hundred ninety-seven".