1551125011 has 4 divisors (see below), whose sum is σ = 1554827400. Its totient is φ = 1547422624.

The previous prime is 1551125003. The next prime is 1551125029. The reversal of 1551125011 is 1105211551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1551125011 - 2³ = 1551125003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1551125071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1850566 + ... + 1851403.

It is an arithmetic number, because the mean of its divisors is an integer number (388706850).

Almost surely, 2^1551125011 is an apocalyptic number.

1551125011 is a deficient number, since it is larger than the sum of its proper divisors (3702389).

1551125011 is an equidigital number, since it uses as much as digits as its factorization.

1551125011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702388.

The product of its (nonzero) digits is 250, while the sum is 22.

The square root of 1551125011 is about 39384.3244324439. The cubic root of 1551125011 is about 1157.5744528984.

Adding to 1551125011 its reverse (1105211551), we get a palindrome (2656336562).

The spelling of 1551125011 in words is "one billion, five hundred fifty-one million, one hundred twenty-five thousand, eleven".