38513731 has 2 divisors, whose sum is σ = 38513732. Its totient is φ = 38513730.

The previous prime is 38513693. The next prime is 38513747. The reversal of 38513731 is 13731583.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38513731 - 2⁷ = 38513603 is a prime.

It is a super-2 number, since 2×38513731² = 2966614951080722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38513693 and 38513702.

It is not a weakly prime, because it can be changed into another prime (38513231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19256865 + 19256866.

It is an arithmetic number, because the mean of its divisors is an integer number (19256866).

Almost surely, 2^38513731 is an apocalyptic number.

38513731 is a deficient number, since it is larger than the sum of its proper divisors (1).

38513731 is an equidigital number, since it uses as much as digits as its factorization.

38513731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 31.

The square root of 38513731 is about 6205.9431998690. The cubic root of 38513731 is about 337.7058088108.

The spelling of 38513731 in words is "thirty-eight million, five hundred thirteen thousand, seven hundred thirty-one".