1224953381 has 4 divisors (see below), whose sum is σ = 1240459200. Its totient is φ = 1209447564.

The previous prime is 1224953371. The next prime is 1224953449. The reversal of 1224953381 is 1833594221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1224953381 - 2¹⁴ = 1224936997 is a prime.

It is a super-2 number, since 2×1224953381² = 3001021571246662322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224953321) 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, 7752791 + ... + 7752948.

It is an arithmetic number, because the mean of its divisors is an integer number (310114800).

Almost surely, 2^1224953381 is an apocalyptic number.

It is an amenable number.

1224953381 is a deficient number, since it is larger than the sum of its proper divisors (15505819).

1224953381 is an equidigital number, since it uses as much as digits as its factorization.

1224953381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15505818.

The product of its digits is 51840, while the sum is 38.

The square root of 1224953381 is about 34999.3340079494. The cubic root of 1224953381 is about 1069.9739071286.

Adding to 1224953381 its product of digits (51840), we get a palindrome (1225005221).

The spelling of 1224953381 in words is "one billion, two hundred twenty-four million, nine hundred fifty-three thousand, three hundred eighty-one".