151621601 has 2 divisors, whose sum is σ = 151621602. Its totient is φ = 151621600.

The previous prime is 151621583. The next prime is 151621609. The reversal of 151621601 is 106126151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129049600 + 22572001 = 11360^2 + 4751^2 .

It is a cyclic number.

It is not a de Polignac number, because 151621601 - 2⁶ = 151621537 is a prime.

It is not a weakly prime, because it can be changed into another prime (151621609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75810800 + 75810801.

It is an arithmetic number, because the mean of its divisors is an integer number (75810801).

Almost surely, 2^151621601 is an apocalyptic number.

It is an amenable number.

151621601 is a deficient number, since it is larger than the sum of its proper divisors (1).

151621601 is an equidigital number, since it uses as much as digits as its factorization.

151621601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 151621601 is about 12313.4723372410. The cubic root of 151621601 is about 533.2371018650.

Adding to 151621601 its reverse (106126151), we get a palindrome (257747752).

The spelling of 151621601 in words is "one hundred fifty-one million, six hundred twenty-one thousand, six hundred one".