15450981 has 16 divisors (see below), whose sum is σ = 25355904. Its totient is φ = 8149824.

The previous prime is 15450923. The next prime is 15450983. The reversal of 15450981 is 18905451.

It is not a de Polignac number, because 15450981 - 2¹³ = 15442789 is a prime.

It is a super-2 number, since 2×15450981² = 477465627724722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15450983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28026 + ... + 28571.

It is an arithmetic number, because the mean of its divisors is an integer number (1584744).

Almost surely, 2^15450981 is an apocalyptic number.

It is an amenable number.

15450981 is a deficient number, since it is larger than the sum of its proper divisors (9904923).

15450981 is a wasteful number, since it uses less digits than its factorization.

15450981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56620.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 15450981 is about 3930.7735879849. The cubic root of 15450981 is about 249.0684317003.

The spelling of 15450981 in words is "fifteen million, four hundred fifty thousand, nine hundred eighty-one".