621320151 has 4 divisors (see below), whose sum is σ = 828426872. Its totient is φ = 414213432.

The previous prime is 621320149. The next prime is 621320171. The reversal of 621320151 is 151023126.

621320151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 621320151 - 2¹ = 621320149 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 (621320101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103553356 + ... + 103553361.

It is an arithmetic number, because the mean of its divisors is an integer number (207106718).

Almost surely, 2^621320151 is an apocalyptic number.

621320151 is a deficient number, since it is larger than the sum of its proper divisors (207106721).

621320151 is a wasteful number, since it uses less digits than its factorization.

621320151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207106720.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 621320151 is about 24926.2943696009. The cubic root of 621320151 is about 853.3066817882.

Adding to 621320151 its reverse (151023126), we get a palindrome (772343277).

The spelling of 621320151 in words is "six hundred twenty-one million, three hundred twenty thousand, one hundred fifty-one".