40263213 has 4 divisors (see below), whose sum is σ = 53684288. Its totient is φ = 26842140.

The previous prime is 40263211. The next prime is 40263229. The reversal of 40263213 is 31236204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40263213 - 2¹ = 40263211 is a prime.

It is a super-2 number, since 2×40263213² = 3242252642166738, 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 40263213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40263211) 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, 6710533 + ... + 6710538.

It is an arithmetic number, because the mean of its divisors is an integer number (13421072).

Almost surely, 2^40263213 is an apocalyptic number.

It is an amenable number.

40263213 is a deficient number, since it is larger than the sum of its proper divisors (13421075).

40263213 is a wasteful number, since it uses less digits than its factorization.

40263213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421074.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 40263213 is about 6345.3300150583. The cubic root of 40263213 is about 342.7436964197.

Adding to 40263213 its reverse (31236204), we get a palindrome (71499417).

The spelling of 40263213 in words is "forty million, two hundred sixty-three thousand, two hundred thirteen".