53151997 has 8 divisors (see below), whose sum is σ = 53796600. Its totient is φ = 52510464.

The previous prime is 53151961. The next prime is 53152003. The reversal of 53151997 is 79915135.

It can be written as a sum of positive squares in 4 ways, for example, as 15280281 + 37871716 = 3909^2 + 6154^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53151997 - 2¹¹ = 53149949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53151907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61593 + ... + 62449.

It is an arithmetic number, because the mean of its divisors is an integer number (6724575).

Almost surely, 2^53151997 is an apocalyptic number.

It is an amenable number.

53151997 is a deficient number, since it is larger than the sum of its proper divisors (644603).

53151997 is a wasteful number, since it uses less digits than its factorization.

53151997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535.

The product of its digits is 42525, while the sum is 40.

The square root of 53151997 is about 7290.5416122535. The cubic root of 53151997 is about 375.9873170801.

The spelling of 53151997 in words is "fifty-three million, one hundred fifty-one thousand, nine hundred ninety-seven".