40154213 has 12 divisors (see below), whose sum is σ = 45334380. Its totient is φ = 35513280.

The previous prime is 40154203. The next prime is 40154243. The reversal of 40154213 is 31245104.

It can be written as a sum of positive squares in 2 ways, for example, as 29408929 + 10745284 = 5423^2 + 3278^2 .

It is not a de Polignac number, because 40154213 - 2⁸ = 40153957 is a prime.

It is a super-2 number, since 2×40154213² = 3224721643298738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40154203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8 + ... + 8961.

It is an arithmetic number, because the mean of its divisors is an integer number (3777865).

Almost surely, 2^40154213 is an apocalyptic number.

It is an amenable number.

40154213 is a deficient number, since it is larger than the sum of its proper divisors (5180167).

40154213 is a wasteful number, since it uses less digits than its factorization.

40154213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9028 (or 9017 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40154213 is about 6336.7352004009. The cubic root of 40154213 is about 342.4341266035.

Adding to 40154213 its reverse (31245104), we get a palindrome (71399317).

It can be divided in two parts, 4015 and 4213, that added together give a palindrome (8228).

The spelling of 40154213 in words is "forty million, one hundred fifty-four thousand, two hundred thirteen".