2051011531 has 2 divisors, whose sum is σ = 2051011532. Its totient is φ = 2051011530.

The previous prime is 2051011517. The next prime is 2051011541. The reversal of 2051011531 is 1351101502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051011531 is a prime.

It is a super-2 number, since 2×2051011531² = 8413296600589927922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2051011499 and 2051011508.

It is not a weakly prime, because it can be changed into another prime (2051011541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025505765 + 1025505766.

It is an arithmetic number, because the mean of its divisors is an integer number (1025505766).

Almost surely, 2^2051011531 is an apocalyptic number.

2051011531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051011531 is an equidigital number, since it uses as much as digits as its factorization.

2051011531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 2051011531 is about 45288.0948042640. The cubic root of 2051011531 is about 1270.5429986300.

It can be divided in two parts, 20510 and 11531, that added together give a square (32041 = 179²).

The spelling of 2051011531 in words is "two billion, fifty-one million, eleven thousand, five hundred thirty-one".