51435531547 has 2 divisors, whose sum is σ = 51435531548. Its totient is φ = 51435531546.

The previous prime is 51435531533. The next prime is 51435531559. The reversal of 51435531547 is 74513553415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51435531547 is a prime.

It is a super-2 number, since 2×51435531547² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51435531247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25717765773 + 25717765774.

It is an arithmetic number, because the mean of its divisors is an integer number (25717765774).

Almost surely, 2^51435531547 is an apocalyptic number.

51435531547 is a deficient number, since it is larger than the sum of its proper divisors (1).

51435531547 is an equidigital number, since it uses as much as digits as its factorization.

51435531547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 630000, while the sum is 43.

The spelling of 51435531547 in words is "fifty-one billion, four hundred thirty-five million, five hundred thirty-one thousand, five hundred forty-seven".