1551161249 has 8 divisors (see below), whose sum is σ = 1737910848. Its totient is φ = 1372034160.

The previous prime is 1551161237. The next prime is 1551161263. The reversal of 1551161249 is 9421611551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551161249 is a prime.

It is a super-2 number, since 2×1551161249² = 4812202440798480002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1551161749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1905197 + ... + 1906010.

It is an arithmetic number, because the mean of its divisors is an integer number (217238856).

Almost surely, 2^1551161249 is an apocalyptic number.

It is an amenable number.

1551161249 is a deficient number, since it is larger than the sum of its proper divisors (186749599).

1551161249 is a wasteful number, since it uses less digits than its factorization.

1551161249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811255.

The product of its digits is 10800, while the sum is 35.

The square root of 1551161249 is about 39384.7844858900. The cubic root of 1551161249 is about 1157.5834673999.

The spelling of 1551161249 in words is "one billion, five hundred fifty-one million, one hundred sixty-one thousand, two hundred forty-nine".