72151620 has 48 divisors (see below), whose sum is σ = 204882048. Its totient is φ = 18968320.

The previous prime is 72151619. The next prime is 72151633. The reversal of 72151620 is 2615127.

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, 4209 + ... + 12728.

It is an arithmetic number, because the mean of its divisors is an integer number (4268376).

Almost surely, 2^72151620 is an apocalyptic number.

It is an amenable number.

72151620 is an abundant number, since it is smaller than the sum of its proper divisors (132730428).

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

72151620 is a wasteful number, since it uses less digits than its factorization.

72151620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17020 (or 17018 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 72151620 is about 8494.2109698312. The cubic root of 72151620 is about 416.3085805243.

Adding to 72151620 its reverse (2615127), we get a palindrome (74766747).

It can be divided in two parts, 72151 and 620, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 72151620 in words is "seventy-two million, one hundred fifty-one thousand, six hundred twenty".