1551210017047 has 4 divisors (see below), whose sum is σ = 1551226190416. Its totient is φ = 1551193843680.

The previous prime is 1551210017033. The next prime is 1551210017057. The reversal of 1551210017047 is 7407100121551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551210017047 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 (1551210017057) 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, 7941954 + ... + 8134927.

It is an arithmetic number, because the mean of its divisors is an integer number (387806547604).

Almost surely, 2^{1551210017047} is an apocalyptic number.

1551210017047 is a deficient number, since it is larger than the sum of its proper divisors (16173369).

1551210017047 is an equidigital number, since it uses as much as digits as its factorization.

1551210017047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16173368.

The product of its (nonzero) digits is 9800, while the sum is 34.

Adding to 1551210017047 its reverse (7407100121551), we get a palindrome (8958310138598).

The spelling of 1551210017047 in words is "one trillion, five hundred fifty-one billion, two hundred ten million, seventeen thousand, forty-seven".