151720238 has 8 divisors (see below), whose sum is σ = 231874488. Its totient is φ = 74428744.

The previous prime is 151720201. The next prime is 151720249. The reversal of 151720238 is 832027151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 151720238.

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 3 ways as a sum of consecutive naturals, for example, 715556 + ... + 715767.

It is an arithmetic number, because the mean of its divisors is an integer number (28984311).

Almost surely, 2^151720238 is an apocalyptic number.

151720238 is a deficient number, since it is larger than the sum of its proper divisors (80154250).

151720238 is a wasteful number, since it uses less digits than its factorization.

151720238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431378.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 151720238 is about 12317.4769332035. The cubic root of 151720238 is about 533.3527087579.

Adding to 151720238 its reverse (832027151), we get a palindrome (983747389).

The spelling of 151720238 in words is "one hundred fifty-one million, seven hundred twenty thousand, two hundred thirty-eight".