1151445551 has 16 divisors (see below), whose sum is σ = 1208088000. Its totient is φ = 1096032000.

The previous prime is 1151445541. The next prime is 1151445611. The reversal of 1151445551 is 1555441511.

It is a cyclic number.

It is not a de Polignac number, because 1151445551 - 2³⁰ = 77703727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151445521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822350 + ... + 823748.

It is an arithmetic number, because the mean of its divisors is an integer number (75505500).

Almost surely, 2^1151445551 is an apocalyptic number.

1151445551 is a deficient number, since it is larger than the sum of its proper divisors (56642449).

1151445551 is a wasteful number, since it uses less digits than its factorization.

1151445551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810.

The product of its digits is 10000, while the sum is 32.

The square root of 1151445551 is about 33932.9567087809. The cubic root of 1151445551 is about 1048.1283515928.

The spelling of 1151445551 in words is "one billion, one hundred fifty-one million, four hundred forty-five thousand, five hundred fifty-one".