1551103225 has 12 divisors (see below), whose sum is σ = 2198135104. Its totient is φ = 1063613520.

The previous prime is 1551103207. The next prime is 1551103231. The reversal of 1551103225 is 5223011551.

It is not a de Polignac number, because 1551103225 - 2¹³ = 1551095033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551103225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4431549 + ... + 4431898.

Almost surely, 2^1551103225 is an apocalyptic number.

It is an amenable number.

1551103225 is a deficient number, since it is larger than the sum of its proper divisors (647031879).

1551103225 is an equidigital number, since it uses as much as digits as its factorization.

1551103225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863464 (or 8863459 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1551103225 is about 39384.0478493514. The cubic root of 1551103225 is about 1157.5690333835.

Adding to 1551103225 its reverse (5223011551), we get a palindrome (6774114776).

The spelling of 1551103225 in words is "one billion, five hundred fifty-one million, one hundred three thousand, two hundred twenty-five".