1553222249 has 4 divisors (see below), whose sum is σ = 1554155664. Its totient is φ = 1552288836.

The previous prime is 1553222227. The next prime is 1553222287. The reversal of 1553222249 is 9422223551.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9422223551 = 13 ⋅724786427.

It is a cyclic number.

It is not a de Polignac number, because 1553222249 - 2²⁸ = 1284786793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1553222219) 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, 464207 + ... + 467540.

It is an arithmetic number, because the mean of its divisors is an integer number (388538916).

Almost surely, 2^1553222249 is an apocalyptic number.

It is an amenable number.

1553222249 is a deficient number, since it is larger than the sum of its proper divisors (933415).

1553222249 is an equidigital number, since it uses as much as digits as its factorization.

1553222249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933414.

The product of its digits is 43200, while the sum is 35.

The square root of 1553222249 is about 39410.9407271636. The cubic root of 1553222249 is about 1158.0959272661.

The spelling of 1553222249 in words is "one billion, five hundred fifty-three million, two hundred twenty-two thousand, two hundred forty-nine".