31381069 has 8 divisors (see below), whose sum is σ = 32331008. Its totient is φ = 30436560.

The previous prime is 31381061. The next prime is 31381073. The reversal of 31381069 is 96018313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31381069 - 2³ = 31381061 is a prime.

It is a super-2 number, since 2×31381069² = 1969542983165522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31381069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31381061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12424 + ... + 14734.

It is an arithmetic number, because the mean of its divisors is an integer number (4041376).

Almost surely, 2^31381069 is an apocalyptic number.

It is an amenable number.

31381069 is a deficient number, since it is larger than the sum of its proper divisors (949939).

31381069 is a wasteful number, since it uses less digits than its factorization.

31381069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 31381069 is about 5601.8808448592. The cubic root of 31381069 is about 315.4200124901.

The spelling of 31381069 in words is "thirty-one million, three hundred eighty-one thousand, sixty-nine".