251223453122 has 8 divisors (see below), whose sum is σ = 380566221372. Its totient is φ = 124368046000.

The previous prime is 251223453079. The next prime is 251223453149. The reversal of 251223453122 is 221354322152.

It can be written as a sum of positive squares in 2 ways, for example, as 169621246201 + 81602206921 = 411851^2 + 285661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×251223453122² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621840029 + ... + 621840432.

Almost surely, 2^251223453122 is an apocalyptic number.

251223453122 is a deficient number, since it is larger than the sum of its proper divisors (129342768250).

251223453122 is a wasteful number, since it uses less digits than its factorization.

251223453122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243680564.

The product of its digits is 28800, while the sum is 32.

Adding to 251223453122 its reverse (221354322152), we get a palindrome (472577775274).

The spelling of 251223453122 in words is "two hundred fifty-one billion, two hundred twenty-three million, four hundred fifty-three thousand, one hundred twenty-two".