151221511015 has 16 divisors (see below), whose sum is σ = 189377938368. Its totient is φ = 115703698176.

The previous prime is 151221511013. The next prime is 151221511031. The reversal of 151221511015 is 510115122151.

It is a cyclic number.

It is not a de Polignac number, because 151221511015 - 2¹ = 151221511013 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 (151221511013) 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 15 ways as a sum of consecutive naturals, for example, 963547 + ... + 1109443.

It is an arithmetic number, because the mean of its divisors is an integer number (11836121148).

Almost surely, 2^151221511015 is an apocalyptic number.

151221511015 is a deficient number, since it is larger than the sum of its proper divisors (38156427353).

151221511015 is a wasteful number, since it uses less digits than its factorization.

151221511015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154938.

The product of its (nonzero) digits is 500, while the sum is 25.

Adding to 151221511015 its reverse (510115122151), we get a palindrome (661336633166).

The spelling of 151221511015 in words is "one hundred fifty-one billion, two hundred twenty-one million, five hundred eleven thousand, fifteen".