154222131 has 16 divisors (see below), whose sum is σ = 235299584. Its totient is φ = 88016544.

The previous prime is 154222129. The next prime is 154222139. The reversal of 154222131 is 131222451.

154222131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 154222131 - 2¹ = 154222129 is a prime.

It is a super-2 number, since 2×154222131² = 47568931380362322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154222098 and 154222107.

It is not an unprimeable number, because it can be changed into a prime (154222139) 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, 14385 + ... + 22701.

It is an arithmetic number, because the mean of its divisors is an integer number (14706224).

Almost surely, 2^154222131 is an apocalyptic number.

154222131 is a deficient number, since it is larger than the sum of its proper divisors (81077453).

154222131 is an equidigital number, since it uses as much as digits as its factorization.

154222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9210.

The product of its digits is 480, while the sum is 21.

The square root of 154222131 is about 12418.6203339985. The cubic root of 154222131 is about 536.2684329220.

Adding to 154222131 its reverse (131222451), we get a palindrome (285444582).

The spelling of 154222131 in words is "one hundred fifty-four million, two hundred twenty-two thousand, one hundred thirty-one".