1061331554 has 4 divisors (see below), whose sum is σ = 1591997334. Its totient is φ = 530665776.

The previous prime is 1061331529. The next prime is 1061331559. The reversal of 1061331554 is 4551331601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4551331601 = 29 ⋅156942469.

It can be written as a sum of positive squares in only one way, i.e., 1051250929 + 10080625 = 32423^2 + 3175^2 .

It is a super-2 number, since 2×1061331554² = 2252849335032109832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061331559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265332887 + ... + 265332890.

Almost surely, 2^1061331554 is an apocalyptic number.

1061331554 is a deficient number, since it is larger than the sum of its proper divisors (530665780).

1061331554 is an equidigital number, since it uses as much as digits as its factorization.

1061331554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530665779.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1061331554 is about 32578.0839522523. The cubic root of 1061331554 is about 1020.0395838797.

The spelling of 1061331554 in words is "one billion, sixty-one million, three hundred thirty-one thousand, five hundred fifty-four".