151242220 has 12 divisors (see below), whose sum is σ = 317608704. Its totient is φ = 60496880.

The previous prime is 151242173. The next prime is 151242229. The reversal of 151242220 is 22242151.

It is a super-2 number, since 2×151242220² = 45748418221056800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (151242229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3781036 + ... + 3781075.

It is an arithmetic number, because the mean of its divisors is an integer number (26467392).

Almost surely, 2^151242220 is an apocalyptic number.

151242220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

151242220 is an abundant number, since it is smaller than the sum of its proper divisors (166366484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151242220 is a wasteful number, since it uses less digits than its factorization.

151242220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7562120 (or 7562118 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 151242220 is about 12298.0575702019. The cubic root of 151242220 is about 532.7919828158.

Adding to 151242220 its reverse (22242151), we get a palindrome (173484371).

The spelling of 151242220 in words is "one hundred fifty-one million, two hundred forty-two thousand, two hundred twenty".