51031431541 has 4 divisors (see below), whose sum is σ = 52677606784. Its totient is φ = 49385256300.

The previous prime is 51031431509. The next prime is 51031431551. The reversal of 51031431541 is 14513413015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51031431541 - 2⁵ = 51031431509 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 (51031431551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823087575 + ... + 823087636.

It is an arithmetic number, because the mean of its divisors is an integer number (13169401696).

Almost surely, 2^51031431541 is an apocalyptic number.

It is an amenable number.

51031431541 is a deficient number, since it is larger than the sum of its proper divisors (1646175243).

51031431541 is a wasteful number, since it uses less digits than its factorization.

51031431541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646175242.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 51031431541 its reverse (14513413015), we get a palindrome (65544844556).

The spelling of 51031431541 in words is "fifty-one billion, thirty-one million, four hundred thirty-one thousand, five hundred forty-one".