151649521 has 2 divisors, whose sum is σ = 151649522. Its totient is φ = 151649520.

The previous prime is 151649513. The next prime is 151649573. The reversal of 151649521 is 125946151.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146410000 + 5239521 = 12100^2 + 2289^2 .

It is a cyclic number.

It is not a de Polignac number, because 151649521 - 2³ = 151649513 is a prime.

It is not a weakly prime, because it can be changed into another prime (151649021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75824760 + 75824761.

It is an arithmetic number, because the mean of its divisors is an integer number (75824761).

Almost surely, 2^151649521 is an apocalyptic number.

It is an amenable number.

151649521 is a deficient number, since it is larger than the sum of its proper divisors (1).

151649521 is an equidigital number, since it uses as much as digits as its factorization.

151649521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 151649521 is about 12314.6060026296. The cubic root of 151649521 is about 533.2698304166.

The spelling of 151649521 in words is "one hundred fifty-one million, six hundred forty-nine thousand, five hundred twenty-one".