151223440 has 80 divisors (see below), whose sum is σ = 369119232. Its totient is φ = 57549312.

The previous prime is 151223417. The next prime is 151223491. The reversal of 151223440 is 44322151.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 138577 + ... + 139663.

Almost surely, 2^151223440 is an apocalyptic number.

151223440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151223440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184559616).

151223440 is an abundant number, since it is smaller than the sum of its proper divisors (217895792).

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

151223440 is a wasteful number, since it uses less digits than its factorization.

151223440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 151223440 is about 12297.2940112856. The cubic root of 151223440 is about 532.7699293450.

Adding to 151223440 its reverse (44322151), we get a palindrome (195545591).

The spelling of 151223440 in words is "one hundred fifty-one million, two hundred twenty-three thousand, four hundred forty".