1531023061 has 2 divisors, whose sum is σ = 1531023062. Its totient is φ = 1531023060.

The previous prime is 1531023049. The next prime is 1531023103. The reversal of 1531023061 is 1603201351.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819734161 + 711288900 = 28631^2 + 26670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1531023061 is a prime.

It is a super-2 number, since 2×1531023061² = 4688063226627619442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531020061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765511530 + 765511531.

It is an arithmetic number, because the mean of its divisors is an integer number (765511531).

Almost surely, 2^1531023061 is an apocalyptic number.

It is an amenable number.

1531023061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531023061 is an equidigital number, since it uses as much as digits as its factorization.

1531023061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1531023061 is about 39128.2897786244. The cubic root of 1531023061 is about 1152.5521293687.

The spelling of 1531023061 in words is "one billion, five hundred thirty-one million, twenty-three thousand, sixty-one".