1551442025 has 24 divisors (see below), whose sum is σ = 2200436544. Its totient is φ = 1062964800.

The previous prime is 1551442019. The next prime is 1551442051. The reversal of 1551442025 is 5202441551.

It is not a de Polignac number, because 1551442025 - 2⁶ = 1551441961 is a prime.

It is a super-2 number, since 2×1551442025² = 4813944713872201250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263615 + ... + 269435.

It is an arithmetic number, because the mean of its divisors is an integer number (91684856).

Almost surely, 2^1551442025 is an apocalyptic number.

It is an amenable number.

1551442025 is a deficient number, since it is larger than the sum of its proper divisors (648994519).

1551442025 is a wasteful number, since it uses less digits than its factorization.

1551442025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7361 (or 7356 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1551442025 is about 39388.3488483587. The cubic root of 1551442025 is about 1157.6533079891.

Adding to 1551442025 its reverse (5202441551), we get a palindrome (6753883576).

The spelling of 1551442025 in words is "one billion, five hundred fifty-one million, four hundred forty-two thousand, twenty-five".