151220617 has 4 divisors (see below), whose sum is σ = 151328016. Its totient is φ = 151113220.

The previous prime is 151220603. The next prime is 151220623. The reversal of 151220617 is 716022151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151220617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151220591 and 151220600.

It is not an unprimeable number, because it can be changed into a prime (151220687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51559 + ... + 54412.

It is an arithmetic number, because the mean of its divisors is an integer number (37832004).

Almost surely, 2^151220617 is an apocalyptic number.

It is an amenable number.

151220617 is a deficient number, since it is larger than the sum of its proper divisors (107399).

151220617 is a wasteful number, since it uses less digits than its factorization.

151220617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107398.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 151220617 is about 12297.1792294005. The cubic root of 151220617 is about 532.7666141207.

Adding to 151220617 its reverse (716022151), we get a palindrome (867242768).

The spelling of 151220617 in words is "one hundred fifty-one million, two hundred twenty thousand, six hundred seventeen".