40251513 has 4 divisors (see below), whose sum is σ = 53668688. Its totient is φ = 26834340.

The previous prime is 40251493. The next prime is 40251517. The reversal of 40251513 is 31515204.

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 40251513 - 2²⁵ = 6697081 is a prime.

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 40251513.

It is not an unprimeable number, because it can be changed into a prime (40251517) 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, 6708583 + ... + 6708588.

It is an arithmetic number, because the mean of its divisors is an integer number (13417172).

Almost surely, 2^40251513 is an apocalyptic number.

It is an amenable number.

40251513 is a deficient number, since it is larger than the sum of its proper divisors (13417175).

40251513 is a wasteful number, since it uses less digits than its factorization.

40251513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13417174.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 40251513 is about 6344.4080102087. The cubic root of 40251513 is about 342.7104941536.

Adding to 40251513 its reverse (31515204), we get a palindrome (71766717).

It can be divided in two parts, 402 and 51513, that added together give a palindrome (51915).

The spelling of 40251513 in words is "forty million, two hundred fifty-one thousand, five hundred thirteen".