51343551 has 40 divisors (see below), whose sum is σ = 88792704. Its totient is φ = 28959120.

The previous prime is 51343549. The next prime is 51343559. The reversal of 51343551 is 15534315.

It is not a de Polignac number, because 51343551 - 2¹ = 51343549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343559) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46516 + ... + 47606.

Almost surely, 2^51343551 is an apocalyptic number.

51343551 is a deficient number, since it is larger than the sum of its proper divisors (37449153).

51343551 is a wasteful number, since it uses less digits than its factorization.

51343551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1184 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 51343551 is about 7165.4414379018. The cubic root of 51343551 is about 371.6738165712.

Adding to 51343551 its reverse (15534315), we get a palindrome (66877866).

The spelling of 51343551 in words is "fifty-one million, three hundred forty-three thousand, five hundred fifty-one".