151547821 has 2 divisors, whose sum is σ = 151547822. Its totient is φ = 151547820.

The previous prime is 151547779. The next prime is 151547831. The reversal of 151547821 is 128745151.

151547821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138909796 + 12638025 = 11786^2 + 3555^2 .

It is a cyclic number.

It is not a de Polignac number, because 151547821 - 2¹³ = 151539629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151547831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75773910 + 75773911.

It is an arithmetic number, because the mean of its divisors is an integer number (75773911).

Almost surely, 2^151547821 is an apocalyptic number.

It is an amenable number.

151547821 is a deficient number, since it is larger than the sum of its proper divisors (1).

151547821 is an equidigital number, since it uses as much as digits as its factorization.

151547821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 34.

The square root of 151547821 is about 12310.4760671552. The cubic root of 151547821 is about 533.1505956851.

The spelling of 151547821 in words is "one hundred fifty-one million, five hundred forty-seven thousand, eight hundred twenty-one".