1661050531 has 8 divisors (see below), whose sum is σ = 1921215744. Its totient is φ = 1406603400.

The previous prime is 1661050529. The next prime is 1661050537. The reversal of 1661050531 is 1350501661.

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

It is a cyclic number.

It is not a de Polignac number, because 1661050531 - 2¹ = 1661050529 is a prime.

It is a super-2 number, since 2×1661050531² = 5518177733070763922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1661050531.

It is not an unprimeable number, because it can be changed into a prime (1661050537) 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, 1428895 + ... + 1430056.

It is an arithmetic number, because the mean of its divisors is an integer number (240151968).

Almost surely, 2^1661050531 is an apocalyptic number.

1661050531 is a deficient number, since it is larger than the sum of its proper divisors (260165213).

1661050531 is an equidigital number, since it uses as much as digits as its factorization.

1661050531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859041.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 1661050531 is about 40755.9876705252. The cubic root of 1661050531 is about 1184.2978698281.

The spelling of 1661050531 in words is "one billion, six hundred sixty-one million, fifty thousand, five hundred thirty-one".