40151220 has 48 divisors (see below), whose sum is σ = 112831488. Its totient is φ = 10668160.

The previous prime is 40151219. The next prime is 40151239. The reversal of 40151220 is 2215104.

It is a super-2 number, since 2×40151220² = 3224240934976800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40151220.

It is a congruent number.

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, 17965 + ... + 20075.

It is an arithmetic number, because the mean of its divisors is an integer number (2350656).

Almost surely, 2^40151220 is an apocalyptic number.

It is an amenable number.

40151220 is an abundant number, since it is smaller than the sum of its proper divisors (72680268).

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

40151220 is a wasteful number, since it uses less digits than its factorization.

40151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 40151220 is about 6336.4990333780. The cubic root of 40151220 is about 342.4256183157.

Adding to 40151220 its reverse (2215104), we get a palindrome (42366324).

The spelling of 40151220 in words is "forty million, one hundred fifty-one thousand, two hundred twenty".