22031154 has 12 divisors (see below), whose sum is σ = 47734206. Its totient is φ = 7343712.

The previous prime is 22031137. The next prime is 22031159. The reversal of 22031154 is 45113022.

It can be written as a sum of positive squares in only one way, i.e., 19158129 + 2873025 = 4377^2 + 1695^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1223953 = 22031154 / (2 + 2 + 0 + 3 + 1 + 1 + 5 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 611959 + ... + 611994.

Almost surely, 2^22031154 is an apocalyptic number.

22031154 is an abundant number, since it is smaller than the sum of its proper divisors (25703052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22031154 is a wasteful number, since it uses less digits than its factorization.

22031154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223961 (or 1223958 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22031154 is about 4693.7356124946. The cubic root of 22031154 is about 280.3361354291.

Adding to 22031154 its reverse (45113022), we get a palindrome (67144176).

The spelling of 22031154 in words is "twenty-two million, thirty-one thousand, one hundred fifty-four".