21514052340551 has 4 divisors (see below), whose sum is σ = 21543645260592. Its totient is φ = 21484459420512.

The previous prime is 21514052340533. The next prime is 21514052340569. The reversal of 21514052340551 is 15504325041512.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21514052340533) and next prime (21514052340569).

It is a cyclic number.

It is not a de Polignac number, because 21514052340551 - 2²² = 21514048146247 is a prime.

It is a super-2 number, since 2×21514052340551² (a number of 27 digits) contains 22 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 (21514052340511) 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, 14796458930 + ... + 14796460383.

It is an arithmetic number, because the mean of its divisors is an integer number (5385911315148).

Almost surely, 2^{21514052340551} is an apocalyptic number.

21514052340551 is a deficient number, since it is larger than the sum of its proper divisors (29592920041).

21514052340551 is an equidigital number, since it uses as much as digits as its factorization.

21514052340551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29592920040.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 21514052340551 in words is "twenty-one trillion, five hundred fourteen billion, fifty-two million, three hundred forty thousand, five hundred fifty-one".