7420525531 has 4 divisors (see below), whose sum is σ = 7421788512. Its totient is φ = 7419262552.

The previous prime is 7420525513. The next prime is 7420525547. The reversal of 7420525531 is 1355250247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355250247 = 13 ⋅104250019.

It is a cyclic number.

It is not a de Polignac number, because 7420525531 - 2¹⁵ = 7420492763 is a prime.

It is a super-2 number, since 2×7420525531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7420525501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622636 + ... + 634441.

It is an arithmetic number, because the mean of its divisors is an integer number (1855447128).

Almost surely, 2^7420525531 is an apocalyptic number.

7420525531 is a deficient number, since it is larger than the sum of its proper divisors (1262981).

7420525531 is a wasteful number, since it uses less digits than its factorization.

7420525531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262980.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 7420525531 is about 86142.4722828408. The cubic root of 7420525531 is about 1950.4952089653.

Adding to 7420525531 its reverse (1355250247), we get a palindrome (8775775778).

The spelling of 7420525531 in words is "seven billion, four hundred twenty million, five hundred twenty-five thousand, five hundred thirty-one".