1551197065 has 64 divisors (see below), whose sum is σ = 2190901248. Its totient is φ = 1043539200.

The previous prime is 1551197047. The next prime is 1551197077. The reversal of 1551197065 is 5607911551.

It is not a de Polignac number, because 1551197065 - 2¹⁵ = 1551164297 is a prime.

It is a super-2 number, since 2×1551197065² = 4812424668929228450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4226512 + ... + 4226878.

It is an arithmetic number, because the mean of its divisors is an integer number (34232832).

Almost surely, 2^1551197065 is an apocalyptic number.

It is an amenable number.

1551197065 is a deficient number, since it is larger than the sum of its proper divisors (639704183).

1551197065 is a wasteful number, since it uses less digits than its factorization.

1551197065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its (nonzero) digits is 47250, while the sum is 40.

The square root of 1551197065 is about 39385.2391766255. The cubic root of 1551197065 is about 1157.5923767875.

The spelling of 1551197065 in words is "one billion, five hundred fifty-one million, one hundred ninety-seven thousand, sixty-five".