122157631 has 16 divisors (see below), whose sum is σ = 137237760. Its totient is φ = 108051840.

The previous prime is 122157589. The next prime is 122157643. The reversal of 122157631 is 136751221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122157631 - 2¹⁷ = 122026559 is a prime.

It is a super-2 number, since 2×122157631² = 29844973623064322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122157631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122157131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40870 + ... + 43756.

It is an arithmetic number, because the mean of its divisors is an integer number (8577360).

Almost surely, 2^122157631 is an apocalyptic number.

122157631 is a deficient number, since it is larger than the sum of its proper divisors (15080129).

122157631 is a wasteful number, since it uses less digits than its factorization.

122157631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054.

The product of its digits is 2520, while the sum is 28.

The square root of 122157631 is about 11052.4943338597. The cubic root of 122157631 is about 496.1810806374.

The spelling of 122157631 in words is "one hundred twenty-two million, one hundred fifty-seven thousand, six hundred thirty-one".