151009631 has 4 divisors (see below), whose sum is σ = 151034664. Its totient is φ = 150984600.

The previous prime is 151009627. The next prime is 151009633. The reversal of 151009631 is 136900151.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 136900151 = 499 ⋅274349.

It is a cyclic number.

It is not a de Polignac number, because 151009631 - 2² = 151009627 is a prime.

It is a super-2 number, since 2×151009631² = 45607817309512322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151009631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151009633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696 + ... + 17586.

It is an arithmetic number, because the mean of its divisors is an integer number (37758666).

Almost surely, 2^151009631 is an apocalyptic number.

151009631 is a deficient number, since it is larger than the sum of its proper divisors (25033).

151009631 is a wasteful number, since it uses less digits than its factorization.

151009631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25032.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 151009631 is about 12288.5976010284. The cubic root of 151009631 is about 532.5187232868.

Adding to 151009631 its reverse (136900151), we get a palindrome (287909782).

The spelling of 151009631 in words is "one hundred fifty-one million, nine thousand, six hundred thirty-one".