151601531 has 16 divisors (see below), whose sum is σ = 163188960. Its totient is φ = 140555520.

The previous prime is 151601521. The next prime is 151601537. The reversal of 151601531 is 135106151.

It is a cyclic number.

It is not a de Polignac number, because 151601531 - 2¹⁸ = 151339387 is a prime.

It is a super-2 number, since 2×151601531² = 45966048403087922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151601497 and 151601506.

It is not an unprimeable number, because it can be changed into a prime (151601537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75071 + ... + 77063.

It is an arithmetic number, because the mean of its divisors is an integer number (10199310).

Almost surely, 2^151601531 is an apocalyptic number.

151601531 is a deficient number, since it is larger than the sum of its proper divisors (11587429).

151601531 is a wasteful number, since it uses less digits than its factorization.

151601531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 151601531 is about 12312.6573492484. The cubic root of 151601531 is about 533.2135728058.

Adding to 151601531 its reverse (135106151), we get a palindrome (286707682).

The spelling of 151601531 in words is "one hundred fifty-one million, six hundred one thousand, five hundred thirty-one".