45538239731 has 2 divisors, whose sum is σ = 45538239732. Its totient is φ = 45538239730.

The previous prime is 45538239713. The next prime is 45538239739. The reversal of 45538239731 is 13793283554.

45538239731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (45538239713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45538239731 is a prime.

It is a super-2 number, since 2×45538239731² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45538239731.

It is not a weakly prime, because it can be changed into another prime (45538239739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22769119865 + 22769119866.

It is an arithmetic number, because the mean of its divisors is an integer number (22769119866).

Almost surely, 2^45538239731 is an apocalyptic number.

45538239731 is a deficient number, since it is larger than the sum of its proper divisors (1).

45538239731 is an equidigital number, since it uses as much as digits as its factorization.

45538239731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 50.

The spelling of 45538239731 in words is "forty-five billion, five hundred thirty-eight million, two hundred thirty-nine thousand, seven hundred thirty-one".