15940051 has 4 divisors (see below), whose sum is σ = 16086400. Its totient is φ = 15793704.

The previous prime is 15940049. The next prime is 15940073. The reversal of 15940051 is 15004951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15004951 = 13 ⋅1154227.

It is a cyclic number.

It is not a de Polignac number, because 15940051 - 2¹ = 15940049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15939998 and 15940025.

It is not an unprimeable number, because it can be changed into a prime (15940091) 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, 73011 + ... + 73228.

It is an arithmetic number, because the mean of its divisors is an integer number (4021600).

Almost surely, 2^15940051 is an apocalyptic number.

15940051 is the 1786-th centered decagonal number.

15940051 is a deficient number, since it is larger than the sum of its proper divisors (146349).

15940051 is a wasteful number, since it uses less digits than its factorization.

15940051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146348.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 15940051 is about 3992.4993425172. The cubic root of 15940051 is about 251.6691035732.

The spelling of 15940051 in words is "fifteen million, nine hundred forty thousand, fifty-one".