15051997 has 2 divisors, whose sum is σ = 15051998. Its totient is φ = 15051996.

The previous prime is 15051983. The next prime is 15052001. The reversal of 15051997 is 79915051.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7901721 + 7150276 = 2811^2 + 2674^2 .

It is a cyclic number.

It is not a de Polignac number, because 15051997 - 2¹¹ = 15049949 is a prime.

It is a super-2 number, since 2×15051997² = 453125227376018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15051917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7525998 + 7525999.

It is an arithmetic number, because the mean of its divisors is an integer number (7525999).

Almost surely, 2^15051997 is an apocalyptic number.

It is an amenable number.

15051997 is a deficient number, since it is larger than the sum of its proper divisors (1).

15051997 is an equidigital number, since it uses as much as digits as its factorization.

15051997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 15051997 is about 3879.6903226933. The cubic root of 15051997 is about 246.9058468532.

The spelling of 15051997 in words is "fifteen million, fifty-one thousand, nine hundred ninety-seven".