123580249531 has 4 divisors (see below), whose sum is σ = 130849675992. Its totient is φ = 116310823072.

The previous prime is 123580249523. The next prime is 123580249543. The reversal of 123580249531 is 135942085321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123580249531 - 2³ = 123580249523 is a prime.

It is a super-2 number, since 2×123580249531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123580249501) 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, 3634713205 + ... + 3634713238.

It is an arithmetic number, because the mean of its divisors is an integer number (32712418998).

Almost surely, 2^123580249531 is an apocalyptic number.

123580249531 is a deficient number, since it is larger than the sum of its proper divisors (7269426461).

123580249531 is an equidigital number, since it uses as much as digits as its factorization.

123580249531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7269426460.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 123580249531 in words is "one hundred twenty-three billion, five hundred eighty million, two hundred forty-nine thousand, five hundred thirty-one".