3997136551 has 4 divisors (see below), whose sum is σ = 3997290600. Its totient is φ = 3996982504.

The previous prime is 3997136531. The next prime is 3997136557. The reversal of 3997136551 is 1556317993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1556317993 = 4283 ⋅363371.

It is a cyclic number.

It is not a de Polignac number, because 3997136551 - 2²³ = 3988747943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3997136495 and 3997136504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997136557) 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, 27481 + ... + 93538.

It is an arithmetic number, because the mean of its divisors is an integer number (999322650).

Almost surely, 2^3997136551 is an apocalyptic number.

3997136551 is a deficient number, since it is larger than the sum of its proper divisors (154049).

3997136551 is a wasteful number, since it uses less digits than its factorization.

3997136551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154048.

The product of its digits is 765450, while the sum is 49.

The square root of 3997136551 is about 63222.9115985653. The cubic root of 3997136551 is about 1587.0221747163.

The spelling of 3997136551 in words is "three billion, nine hundred ninety-seven million, one hundred thirty-six thousand, five hundred fifty-one".