51534399 has 16 divisors (see below), whose sum is σ = 78665472. Its totient is φ = 29396928.

The previous prime is 51534367. The next prime is 51534407. The reversal of 51534399 is 99343515.

It is not a de Polignac number, because 51534399 - 2⁵ = 51534367 is a prime.

It is a super-3 number, since 3×51534399³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51534319) 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, 12547 + ... + 16139.

It is an arithmetic number, because the mean of its divisors is an integer number (4916592).

Almost surely, 2^51534399 is an apocalyptic number.

51534399 is a deficient number, since it is larger than the sum of its proper divisors (27131073).

51534399 is a wasteful number, since it uses less digits than its factorization.

51534399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286.

The product of its digits is 72900, while the sum is 39.

The square root of 51534399 is about 7178.7463390205. The cubic root of 51534399 is about 372.1337607195.

The spelling of 51534399 in words is "fifty-one million, five hundred thirty-four thousand, three hundred ninety-nine".