145858588531 has 2 divisors, whose sum is σ = 145858588532. Its totient is φ = 145858588530.

The previous prime is 145858588501. The next prime is 145858588607. The reversal of 145858588531 is 135885858541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145858588531 - 2²³ = 145850199923 is a prime.

It is a super-2 number, since 2×145858588531² (a number of 23 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 145858588531.

It is not a weakly prime, because it can be changed into another prime (145858588501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72929294265 + 72929294266.

It is an arithmetic number, because the mean of its divisors is an integer number (72929294266).

Almost surely, 2^145858588531 is an apocalyptic number.

145858588531 is a deficient number, since it is larger than the sum of its proper divisors (1).

145858588531 is an equidigital number, since it uses as much as digits as its factorization.

145858588531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720000, while the sum is 61.

The spelling of 145858588531 in words is "one hundred forty-five billion, eight hundred fifty-eight million, five hundred eighty-eight thousand, five hundred thirty-one".