151315531 has 2 divisors, whose sum is σ = 151315532. Its totient is φ = 151315530.

The previous prime is 151315529. The next prime is 151315553. The reversal of 151315531 is 135513151.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151315531 - 2¹ = 151315529 is a prime.

It is a super-2 number, since 2×151315531² = 45792779843623922, which contains 22 as substring.

Together with 151315529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 151315496 and 151315505.

It is not a weakly prime, because it can be changed into another prime (151315511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75657765 + 75657766.

It is an arithmetic number, because the mean of its divisors is an integer number (75657766).

Almost surely, 2^151315531 is an apocalyptic number.

151315531 is a deficient number, since it is larger than the sum of its proper divisors (1).

151315531 is an equidigital number, since it uses as much as digits as its factorization.

151315531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1125, while the sum is 25.

The square root of 151315531 is about 12301.0378017466. The cubic root of 151315531 is about 532.8780549097.

Adding to 151315531 its reverse (135513151), we get a palindrome (286828682).

The spelling of 151315531 in words is "one hundred fifty-one million, three hundred fifteen thousand, five hundred thirty-one".