1520667231 has 16 divisors (see below), whose sum is σ = 2071304928. Its totient is φ = 992073600.

The previous prime is 1520667217. The next prime is 1520667263. The reversal of 1520667231 is 1327660251.

It is not a de Polignac number, because 1520667231 - 2¹⁴ = 1520650847 is a prime.

It is a super-2 number, since 2×1520667231² = 4624857654874414722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1520667192 and 1520667201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520667131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14961 + ... + 57141.

It is an arithmetic number, because the mean of its divisors is an integer number (129456558).

Almost surely, 2^1520667231 is an apocalyptic number.

1520667231 is a deficient number, since it is larger than the sum of its proper divisors (550637697).

1520667231 is a wasteful number, since it uses less digits than its factorization.

1520667231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42442.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1520667231 is about 38995.7334973969. The cubic root of 1520667231 is about 1149.9476298773.

The spelling of 1520667231 in words is "one billion, five hundred twenty million, six hundred sixty-seven thousand, two hundred thirty-one".