42451232137 has 2 divisors, whose sum is σ = 42451232138. Its totient is φ = 42451232136.

The previous prime is 42451232119. The next prime is 42451232147. The reversal of 42451232137 is 73123215424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40137718336 + 2313513801 = 200344^2 + 48099^2 .

It is a cyclic number.

It is not a de Polignac number, because 42451232137 - 2²⁷ = 42317014409 is a prime.

It is not a weakly prime, because it can be changed into another prime (42451232147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225616068 + 21225616069.

It is an arithmetic number, because the mean of its divisors is an integer number (21225616069).

Almost surely, 2^42451232137 is an apocalyptic number.

It is an amenable number.

42451232137 is a deficient number, since it is larger than the sum of its proper divisors (1).

42451232137 is an equidigital number, since it uses as much as digits as its factorization.

42451232137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 34.

The spelling of 42451232137 in words is "forty-two billion, four hundred fifty-one million, two hundred thirty-two thousand, one hundred thirty-seven".