151220615 has 48 divisors (see below), whose sum is σ = 230590080. Its totient is φ = 94348800.

The previous prime is 151220603. The next prime is 151220623. The reversal of 151220615 is 516022151.

It is a happy number.

It is not a de Polignac number, because 151220615 - 2¹² = 151216519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 251315 + ... + 251915.

It is an arithmetic number, because the mean of its divisors is an integer number (4803960).

Almost surely, 2^151220615 is an apocalyptic number.

151220615 is a deficient number, since it is larger than the sum of its proper divisors (79369465).

151220615 is a wasteful number, since it uses less digits than its factorization.

151220615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 151220615 is about 12297.1791480811. The cubic root of 151220615 is about 532.7666117720.

Adding to 151220615 its reverse (516022151), we get a palindrome (667242766).

The spelling of 151220615 in words is "one hundred fifty-one million, two hundred twenty thousand, six hundred fifteen".