51131455 has 8 divisors (see below), whose sum is σ = 61399872. Its totient is φ = 40877088.

The previous prime is 51131453. The next prime is 51131473. The reversal of 51131455 is 55413115.

It is a happy number.

51131455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51131455 - 2¹ = 51131453 is a prime.

It is a super-2 number, since 2×51131455² = 5228851380834050, 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 (51131453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7837 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (7674984).

Almost surely, 2^51131455 is an apocalyptic number.

51131455 is a deficient number, since it is larger than the sum of its proper divisors (10268417).

51131455 is a wasteful number, since it uses less digits than its factorization.

51131455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025.

The product of its digits is 1500, while the sum is 25.

The square root of 51131455 is about 7150.6261963551. The cubic root of 51131455 is about 371.1613255472.

The spelling of 51131455 in words is "fifty-one million, one hundred thirty-one thousand, four hundred fifty-five".