1390532231 has 16 divisors (see below), whose sum is σ = 1549497600. Its totient is φ = 1237252800.

The previous prime is 1390532189. The next prime is 1390532317. The reversal of 1390532231 is 1322350931.

It is a cyclic number.

It is not a de Polignac number, because 1390532231 - 2¹⁸ = 1390270087 is a prime.

It is a super-2 number, since 2×1390532231² = 3867159770899674722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1390532194 and 1390532203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390532531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102155 + ... + 114963.

It is an arithmetic number, because the mean of its divisors is an integer number (96843600).

Almost surely, 2^1390532231 is an apocalyptic number.

1390532231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1390532231 is a deficient number, since it is larger than the sum of its proper divisors (158965369).

1390532231 is a wasteful number, since it uses less digits than its factorization.

1390532231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13030.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 1390532231 is about 37289.8408551176. The cubic root of 1390532231 is about 1116.1614529734.

The spelling of 1390532231 in words is "one billion, three hundred ninety million, five hundred thirty-two thousand, two hundred thirty-one".