151521001 has 2 divisors, whose sum is σ = 151521002. Its totient is φ = 151521000.

The previous prime is 151520977. The next prime is 151521023. The reversal of 151521001 is 100125151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84198976 + 67322025 = 9176^2 + 8205^2 .

It is a cyclic number.

It is not a de Polignac number, because 151521001 - 2⁹ = 151520489 is a prime.

It is a super-2 number, since 2×151521001² = 45917227488084002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (151521301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75760500 + 75760501.

It is an arithmetic number, because the mean of its divisors is an integer number (75760501).

Almost surely, 2^151521001 is an apocalyptic number.

It is an amenable number.

151521001 is a deficient number, since it is larger than the sum of its proper divisors (1).

151521001 is an equidigital number, since it uses as much as digits as its factorization.

151521001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 151521001 is about 12309.3867028378. The cubic root of 151521001 is about 533.1191425933.

Adding to 151521001 its reverse (100125151), we get a palindrome (251646152).

The spelling of 151521001 in words is "one hundred fifty-one million, five hundred twenty-one thousand, one".