151621247 has 8 divisors (see below), whose sum is σ = 153836496. Its totient is φ = 149420992.

The previous prime is 151621243. The next prime is 151621271. The reversal of 151621247 is 742126151.

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

It is a cyclic number.

It is not a de Polignac number, because 151621247 - 2² = 151621243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151621241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17483 + ... + 24675.

It is an arithmetic number, because the mean of its divisors is an integer number (19229562).

Almost surely, 2^151621247 is an apocalyptic number.

151621247 is a deficient number, since it is larger than the sum of its proper divisors (2215249).

151621247 is a wasteful number, since it uses less digits than its factorization.

151621247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497.

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

The square root of 151621247 is about 12313.4579627333. The cubic root of 151621247 is about 533.2366868712.

Adding to 151621247 its reverse (742126151), we get a palindrome (893747398).

The spelling of 151621247 in words is "one hundred fifty-one million, six hundred twenty-one thousand, two hundred forty-seven".