122513531 has 4 divisors (see below), whose sum is σ = 140015472. Its totient is φ = 105011592.

The previous prime is 122513527. The next prime is 122513557. The reversal of 122513531 is 135315221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135315221 = 313 ⋅432317.

It is not a de Polignac number, because 122513531 - 2² = 122513527 is a prime.

It is a super-2 number, since 2×122513531² = 30019130556175922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122513497 and 122513506.

It is not an unprimeable number, because it can be changed into a prime (122513731) 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, 8750960 + ... + 8750973.

It is an arithmetic number, because the mean of its divisors is an integer number (35003868).

Almost surely, 2^122513531 is an apocalyptic number.

122513531 is a deficient number, since it is larger than the sum of its proper divisors (17501941).

122513531 is an equidigital number, since it uses as much as digits as its factorization.

122513531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17501940.

The product of its digits is 900, while the sum is 23.

The square root of 122513531 is about 11068.5830619822. The cubic root of 122513531 is about 496.6624794826.

Adding to 122513531 its reverse (135315221), we get a palindrome (257828752).

The spelling of 122513531 in words is "one hundred twenty-two million, five hundred thirteen thousand, five hundred thirty-one".