4015542397 has 2 divisors, whose sum is σ = 4015542398. Its totient is φ = 4015542396.

The previous prime is 4015542287. The next prime is 4015542467. The reversal of 4015542397 is 7932455104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3937060516 + 78481881 = 62746^2 + 8859^2 .

It is a cyclic number.

It is not a de Polignac number, because 4015542397 - 2⁷ = 4015542269 is a prime.

It is a super-2 number, since 2×4015542397² = 32249161484209011218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4015543397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2007771198 + 2007771199.

It is an arithmetic number, because the mean of its divisors is an integer number (2007771199).

Almost surely, 2^4015542397 is an apocalyptic number.

It is an amenable number.

4015542397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4015542397 is an equidigital number, since it uses as much as digits as its factorization.

4015542397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 4015542397 is about 63368.3075125098. The cubic root of 4015542397 is about 1589.4543962148.

The spelling of 4015542397 in words is "four billion, fifteen million, five hundred forty-two thousand, three hundred ninety-seven".