51143243503 has 16 divisors (see below), whose sum is σ = 57164228352. Its totient is φ = 45351288000.

The previous prime is 51143243443. The next prime is 51143243561. The reversal of 51143243503 is 30534234115.

It is a cyclic number.

It is not a de Polignac number, because 51143243503 - 2²⁹ = 50606372591 is a prime.

It is a super-2 number, since 2×51143243503² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51143243603) 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, 4283500 + ... + 4295422.

It is an arithmetic number, because the mean of its divisors is an integer number (3572764272).

Almost surely, 2^51143243503 is an apocalyptic number.

51143243503 is a deficient number, since it is larger than the sum of its proper divisors (6020984849).

51143243503 is a wasteful number, since it uses less digits than its factorization.

51143243503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21486.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 51143243503 its reverse (30534234115), we get a palindrome (81677477618).

The spelling of 51143243503 in words is "fifty-one billion, one hundred forty-three million, two hundred forty-three thousand, five hundred three".