1215531450151 has 4 divisors (see below), whose sum is σ = 1222247093704. Its totient is φ = 1208815806600.

The previous prime is 1215531450149. The next prime is 1215531450191. The reversal of 1215531450151 is 1510541355121.

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 1215531450151 - 2¹ = 1215531450149 is a prime.

It is a super-3 number, since 3×1215531450151³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215531450121) 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, 3357821505 + ... + 3357821866.

It is an arithmetic number, because the mean of its divisors is an integer number (305561773426).

Almost surely, 2^{1215531450151} is an apocalyptic number.

1215531450151 is a deficient number, since it is larger than the sum of its proper divisors (6715643553).

1215531450151 is an equidigital number, since it uses as much as digits as its factorization.

1215531450151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715643552.

The product of its (nonzero) digits is 15000, while the sum is 34.

The spelling of 1215531450151 in words is "one trillion, two hundred fifteen billion, five hundred thirty-one million, four hundred fifty thousand, one hundred fifty-one".