71513053 has 4 divisors (see below), whose sum is σ = 72580480. Its totient is φ = 70445628.

The previous prime is 71513051. The next prime is 71513069. The reversal of 71513053 is 35031517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35031517 = 5021 ⋅6977.

It is a cyclic number.

It is not a de Polignac number, because 71513053 - 2¹ = 71513051 is a prime.

It is a super-2 number, since 2×71513053² = 10228233498761618, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71513051) 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, 533613 + ... + 533746.

It is an arithmetic number, because the mean of its divisors is an integer number (18145120).

Almost surely, 2^71513053 is an apocalyptic number.

It is an amenable number.

71513053 is a deficient number, since it is larger than the sum of its proper divisors (1067427).

71513053 is a wasteful number, since it uses less digits than its factorization.

71513053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067426.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 71513053 is about 8456.5390674909. The cubic root of 71513053 is about 415.0767806841.

The spelling of 71513053 in words is "seventy-one million, five hundred thirteen thousand, fifty-three".