1201510551 has 8 divisors (see below), whose sum is σ = 1614628864. Its totient is φ = 794699640.

The previous prime is 1201510549. The next prime is 1201510603. The reversal of 1201510551 is 1550151021.

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

It is not a de Polignac number, because 1201510551 - 2¹ = 1201510549 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 (1201510151) 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, 1576405 + ... + 1577166.

It is an arithmetic number, because the mean of its divisors is an integer number (201828608).

Almost surely, 2^1201510551 is an apocalyptic number.

1201510551 is a deficient number, since it is larger than the sum of its proper divisors (413118313).

1201510551 is a wasteful number, since it uses less digits than its factorization.

1201510551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153701.

The product of its (nonzero) digits is 250, while the sum is 21.

The square root of 1201510551 is about 34662.8122200147. The cubic root of 1201510551 is about 1063.1042710985.

Adding to 1201510551 its reverse (1550151021), we get a palindrome (2751661572).

The spelling of 1201510551 in words is "one billion, two hundred one million, five hundred ten thousand, five hundred fifty-one".