71513901 has 16 divisors (see below), whose sum is σ = 106545600. Its totient is φ = 47406384.

The previous prime is 71513887. The next prime is 71513941. The reversal of 71513901 is 10931517.

It is a happy number.

It is not a de Polignac number, because 71513901 - 2¹⁹ = 70989613 is a prime.

It is a super-2 number, since 2×71513901² = 10228476072475602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71513941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2566 + ... + 12231.

It is an arithmetic number, because the mean of its divisors is an integer number (6659100).

Almost surely, 2^71513901 is an apocalyptic number.

It is an amenable number.

71513901 is a deficient number, since it is larger than the sum of its proper divisors (35031699).

71513901 is a wasteful number, since it uses less digits than its factorization.

71513901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14985 (or 14979 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 71513901 is about 8456.5892060570. The cubic root of 71513901 is about 415.0784213343.

The spelling of 71513901 in words is "seventy-one million, five hundred thirteen thousand, nine hundred one".