127213731 has 12 divisors (see below), whose sum is σ = 186766320. Its totient is φ = 83418480.

The previous prime is 127213729. The next prime is 127213747. The reversal of 127213731 is 137312721.

It is not a de Polignac number, because 127213731 - 2¹ = 127213729 is a prime.

It is a super-2 number, since 2×127213731² = 32366666709880722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 127213695 and 127213704.

It is not an unprimeable number, because it can be changed into a prime (127213781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115311 + ... + 116408.

It is an arithmetic number, because the mean of its divisors is an integer number (15563860).

Almost surely, 2^127213731 is an apocalyptic number.

127213731 is a deficient number, since it is larger than the sum of its proper divisors (59552589).

127213731 is a wasteful number, since it uses less digits than its factorization.

127213731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231786 (or 231783 counting only the distinct ones).

The product of its digits is 1764, while the sum is 27.

The square root of 127213731 is about 11278.9064629511. The cubic root of 127213731 is about 502.9343863971.

The spelling of 127213731 in words is "one hundred twenty-seven million, two hundred thirteen thousand, seven hundred thirty-one".