151641531 has 8 divisors (see below), whose sum is σ = 224654160. Its totient is φ = 101094336.

The previous prime is 151641517. The next prime is 151641541. The reversal of 151641531 is 135146151.

151641531 is a `hidden beast` number, since 15 + 1 + 641 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 151641531 - 2⁶ = 151641467 is a prime.

It is a super-2 number, since 2×151641531² = 45990307848047922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5616353 = 151641531 / (1 + 5 + 1 + 6 + 4 + 1 + 5 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 151641495 and 151641504.

It is not an unprimeable number, because it can be changed into a prime (151641541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2808150 + ... + 2808203.

It is an arithmetic number, because the mean of its divisors is an integer number (28081770).

Almost surely, 2^151641531 is an apocalyptic number.

151641531 is a deficient number, since it is larger than the sum of its proper divisors (73012629).

151641531 is an equidigital number, since it uses as much as digits as its factorization.

151641531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616362 (or 5616356 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 151641531 is about 12314.2815868405. The cubic root of 151641531 is about 533.2604647407.

Adding to 151641531 its reverse (135146151), we get a palindrome (286787682).

The spelling of 151641531 in words is "one hundred fifty-one million, six hundred forty-one thousand, five hundred thirty-one".