151220340 has 72 divisors (see below), whose sum is σ = 465585120. Its totient is φ = 39720384.

The previous prime is 151220339. The next prime is 151220347. The reversal of 151220340 is 43022151.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151220347) 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 23 ways as a sum of consecutive naturals, for example, 5791 + ... + 18329.

It is an arithmetic number, because the mean of its divisors is an integer number (6466460).

Almost surely, 2^151220340 is an apocalyptic number.

151220340 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 151220340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232792560).

151220340 is an abundant number, since it is smaller than the sum of its proper divisors (314364780).

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

151220340 is a wasteful number, since it uses less digits than its factorization.

151220340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12621 (or 12616 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 151220340 is about 12297.1679666499. The cubic root of 151220340 is about 532.7662888202.

Adding to 151220340 its reverse (43022151), we get a palindrome (194242491).

The spelling of 151220340 in words is "one hundred fifty-one million, two hundred twenty thousand, three hundred forty".