13540150421 has 4 divisors (see below), whose sum is σ = 15474457632. Its totient is φ = 11605843212.

The previous prime is 13540150391. The next prime is 13540150423. The reversal of 13540150421 is 12405104531.

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 a cyclic number.

It is not a de Polignac number, because 13540150421 - 2¹⁴ = 13540134037 is a prime.

It is a super-5 number, since 5×13540150421⁵ (a number of 52 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540150423) 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, 967153595 + ... + 967153608.

It is an arithmetic number, because the mean of its divisors is an integer number (3868614408).

Almost surely, 2^13540150421 is an apocalyptic number.

It is an amenable number.

13540150421 is a deficient number, since it is larger than the sum of its proper divisors (1934307211).

13540150421 is an equidigital number, since it uses as much as digits as its factorization.

13540150421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934307210.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 13540150421 its reverse (12405104531), we get a palindrome (25945254952).

The spelling of 13540150421 in words is "thirteen billion, five hundred forty million, one hundred fifty thousand, four hundred twenty-one".