15514139 has 4 divisors (see below), whose sum is σ = 15732720. Its totient is φ = 15295560.

The previous prime is 15514129. The next prime is 15514141. The reversal of 15514139 is 93141551.

15514139 = 432² + 433² + ... + 502².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93141551 = 911 ⋅102241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15514139 is a prime.

It is a super-2 number, since 2×15514139² = 481377017822642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15514129) 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, 109184 + ... + 109325.

It is an arithmetic number, because the mean of its divisors is an integer number (3933180).

Almost surely, 2^15514139 is an apocalyptic number.

15514139 is a deficient number, since it is larger than the sum of its proper divisors (218581).

15514139 is an equidigital number, since it uses as much as digits as its factorization.

15514139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218580.

The product of its digits is 2700, while the sum is 29.

The square root of 15514139 is about 3938.7991824920. The cubic root of 15514139 is about 249.4073374480.

The spelling of 15514139 in words is "fifteen million, five hundred fourteen thousand, one hundred thirty-nine".