71263157 has 4 divisors (see below), whose sum is σ = 81443616. Its totient is φ = 61082700.

The previous prime is 71263151. The next prime is 71263183. The reversal of 71263157 is 75136217.

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.

It is a de Polignac number, because none of the positive numbers 2^k-71263157 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 (71263151) 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, 5090219 + ... + 5090232.

It is an arithmetic number, because the mean of its divisors is an integer number (20360904).

Almost surely, 2^71263157 is an apocalyptic number.

It is an amenable number.

71263157 is a deficient number, since it is larger than the sum of its proper divisors (10180459).

71263157 is a wasteful number, since it uses less digits than its factorization.

71263157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180458.

The product of its digits is 8820, while the sum is 32.

The square root of 71263157 is about 8441.7508255101. The cubic root of 71263157 is about 414.5927334675.

The spelling of 71263157 in words is "seventy-one million, two hundred sixty-three thousand, one hundred fifty-seven".