1387152231 has 8 divisors (see below), whose sum is σ = 1872948480. Its totient is φ = 913062072.

The previous prime is 1387152229. The next prime is 1387152251. The reversal of 1387152231 is 1322517831.

It is a happy number.

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

It is not a de Polignac number, because 1387152231 - 2¹ = 1387152229 is a prime.

It is a super-2 number, since 2×1387152231² = 3848382623936554722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1387152192 and 1387152201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387152211) 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, 2926245 + ... + 2926718.

It is an arithmetic number, because the mean of its divisors is an integer number (234118560).

Almost surely, 2^1387152231 is an apocalyptic number.

1387152231 is a deficient number, since it is larger than the sum of its proper divisors (485796249).

1387152231 is an equidigital number, since it uses as much as digits as its factorization.

1387152231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853045.

The product of its digits is 10080, while the sum is 33.

The square root of 1387152231 is about 37244.4926264273. The cubic root of 1387152231 is about 1115.2563591063.

The spelling of 1387152231 in words is "one billion, three hundred eighty-seven million, one hundred fifty-two thousand, two hundred thirty-one".