1551161516 has 12 divisors (see below), whose sum is σ = 2719726632. Its totient is φ = 774096768.

The previous prime is 1551161503. The next prime is 1551161531. The reversal of 1551161516 is 6151611551.

It is a super-2 number, since 2×1551161516² = 4812204097438836512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368645 + ... + 372828.

It is an arithmetic number, because the mean of its divisors is an integer number (226643886).

Almost surely, 2^1551161516 is an apocalyptic number.

It is an amenable number.

1551161516 is a deficient number, since it is larger than the sum of its proper divisors (1168565116).

1551161516 is a wasteful number, since it uses less digits than its factorization.

1551161516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742000 (or 741998 counting only the distinct ones).

The product of its digits is 4500, while the sum is 32.

The square root of 1551161516 is about 39384.7878755237. The cubic root of 1551161516 is about 1157.5835338178.

The spelling of 1551161516 in words is "one billion, five hundred fifty-one million, one hundred sixty-one thousand, five hundred sixteen".